Manuale d’uso / di manutenzione del prodotto satellite a20 series del fabbricante Toshiba
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Toshiba Personal Computer Satellite A20 Series Maintenance Manual TOSHIBA CORPORATION File Number 960-444.
ii Satellite A20 Maintenance Manual (960-444) Copyright © 2003 by Toshiba Corporation. All rights reserved. Under the copyright laws, this manual cannot be reproduced in any form without the prior written permission of Toshiba. No patent liability is assumed with respect to the use of the inform ation contained herein.
Satellite A20 Maintenance Manual (960-444) iii Preface This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer Satellite A20 Series, referred to as A20 Series in this manual.
iv Satellite A20 Maintenance Manual (960-444) The manual is divided into the following parts: Chapter 1 Hardware Overview describes the Satellite A20 Series system unit and each FRU. Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve FRU problems.
Satellite A20 Maintenance Manual (960-444) v Conventions This manual uses the following formats to describe, identify, and highlight term s and operating procedures. Acronyms On the first appearance and whenever necessary for clarification acronyms are enclosed in parentheses following their definition.
vi Satellite A20 Main tenance Manual (960-444).
Satellite A20 Maintenance Manual (960-444) vii Table of Contents Chapter 1 Hardware Overview 1.1 Features ................................................................................................................... ... 1-1 1.2 System Unit Block Diagram .
viii Satellite A20 Maintenance Manual (960-444) Chapter 3 Tests and Diagnostics 3.1 The Diagnostic Test ................................................................................................... 3-1 3.2 Executing the Diagnostic Test .........
Satellite A20 Maintenance Manual (960-444) ix 4.3 Optional PC Card ..................................................................................................... 4-11 4.4 Optional SD Card ........................................................
x Satellite A20 Maintenance Manual (960-444) Appendices Appendix A Handling the LCD Module ........................................................................... A-1 Appendix B Board Layout ........................................................
Chapter 1 Hardware Overview.
1 Hardware Overview 1-ii Satellite A20 Maintenance Manual (960-444).
1 Hardware Overview Chapter 1 Contents 1.1 Features................................................................................................................... ....1-1 1.2 System Unit Block Diagram ..............................................
1 Hardware Overview 1-iv Satellite A20 Maintenance Manual (960-444) Figures Figure 1-1 Front of the computer .....................................................................................1-5 Figure 1-2 System unit configuration.................
1.1 Features 1 Hardware Overview 1 Features 1.1 Features The Toshiba Satellite A20 Personal Computer us es extensive Large Scale Integration (LSI), and Complementary Metal-Oxide Sem iconductor (CMOS) technology extensively to provide compact size, minim um weight, low power usage and high reliability.
1 Hardware Overview 1.1 Features CD-RW/DVD Drive A full-size, CD-RW/DVD-ROM drive modul e lets you run CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD-ROMs at maximum 24 speed. It writes CD-R at up to 24 speed and CD-RW at up to 10 speed.
1.1 Features 1 Hardware Overview Display The following displays are available: 14.1-inch XGA TFT screen, 1,024 × 768 pixels, 16M colors • • • 15.
1 Hardware Overview 1.1 Features W ireless LAN (mini PCI Card slot) In some models, a Mini PCI Card with wireless LAN functions is available as a dealer-installed option. The mini PCI Card for wireless LAN is co mpatible with other LAN systems based on Direct Sequence Spread Spectrum radio technology that complies with the IEEE 802.
1.1 Features 1 Hardware Overview Internal m odem The internal modem is equipped as a modem daughter card (MDC). The internal modem provides capability fo r data and fax communication and supports ITU-TV.90. In the U.S. and Canada, V.92 is supported.
1 Hardware Overview 1.1 Features System Board PJ5620 TV PJ4600 CRT PJ5601 LCD 1 PJ9511 PJ2130 PJ6004 PJ6000 PJ9600 External Microphone Sound Board PAD PJ3240 Switch Board PJ3230 SD Card PJ9510 PJ9601 .
1.2 System Unit Block Diagram 1 Hardware Overview 1.2 System Unit Block Diagram Figure 1-3 is the block diagram of the system unit. Clock Gen. ICS ICS951104 CPUCLK MEMCLK AGPCLK PCICLK 48MCLK 14MCLK P3V P3V V oltage Regulator Thermal Sensor Analog Devices ADM1032 CPU Intel Pentium 4 DT Northwood 2.
1 Hardware Overview 1.2 System Unit Block Diagram The system unit is composed of the following m ajor components: Processor Intel Desktop Pentium 4 Processor 2.
1.2 System Unit Block Diagram 1 Hardware Overview PCI Chip Set North Bridge ALi M1672 Northbridge with Integrated Graphic Chip ALi PCI Northbridge Core Logic Processor Support – Supports Intel P.
1 Hardware Overview 1.2 System Unit Block Diagram PCI Bus Support – Supports synchronous / asynchronous cl ock mode between the processor bus and the PCI bus – 32-bit Address / Data PCI bus using .
1.2 System Unit Block Diagram 1 Hardware Overview South Bridge ALi M1535+ Southbridge – Provides a high integration bridge between the PCI Bus and Peripheral Bus (PCI spec.
1 Hardware Overview 1.2 System Unit Block Diagram KBC/EC (Keyboard Controller/Embedded Controller) • One M306K9FCLRP chip functions as both KBC and EC.
1.2 System Unit Block Diagram 1 Hardware Overview Clock Generator • One ICS951104 is used. This device generates the system clock. Satellite A20 Ma intenance Manual (96 0-444) 1-13.
1 Hardware Overview 1.3 2.5-inch Hard Disk Drive 1.3 2.5-inch Hard Disk Drive The removable HDD is a random-access, non-volati le storage device. It has a non-removable 2.5-inch magnetic disk and mini-W inchester type magnetic heads. The computer supports a 30GB, 40GB, 60GB or 80GB HDD.
1.3 2.5-inch Hard Disk Drive 1 Hardware Overview Table 1-1 2.5-inch HDD specifications (2/3) Specifications Parameter HITA CHI G8BC0000F310 HITA CHI G8BC0000F410 G8BC0000Z410 HITA CHI G8BC00009110 HITA CHI G8BC0000F610 Storage size (formatted) 30 40 60 Speed (RPM) 4.
1 Hardware Overview 1.4 CD-RW/DVD Drive 1.4 CD-RW/DVD Drive A full-size, CD-RW/DVD-ROM drive module lets you run CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 sp eed and CD-ROMs at maximum 24 speed. It writes CD-R at up to 24 speed and CD-RW at up to 10 speed.
1.4 CD-RW/DVD Drive 1 Hardware Overview Table 1-2 CD-RW/DVD drive specifications (1/4) Specifications Item TEAC G8CC0000Q410 Read (CD-ROM) 1,545 to 3,600 KB/sec. Read (DVD-ROM) 4,469 to 10,816 KB/sec. Write (CD-R) - Transfer rate Write (CD-RW) - CD-ROM 90 Average access time (msec.
1 Hardware Overview 1.4 CD-RW/DVD Drive Table 1-2 CD-RW/DVD drive specifications (3/4) TEAC G8CC0001D410 Item DVD-ROM (Play mode) CD-ROM (Play mode) CD-R/CD-RW (Record mode) ATAPI Burst (Mbytes/s) 33.
1.5 DVD-R/-RW Drive 1 Hardware Overview 1.5 DVD-R/-RW Drive A full-size DVD-R/-RW drive module lets you reco rd data to rewritable CD/DVDs as well as run either 12 cm (4.72") or 8 cm (3.15") CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD-ROMs at maximum 24 speed.
1 Hardware Overview 1.6 DVD Multi Drive 1.6 DVD Multi Drive A full-size, DVD Multi drive module lets you ru n either 12 cm (4.72") or 8 cm (3.15") CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD- ROMs at maximum 24 speed.
1.6 DVD Multi Drive 1 Hardware Overview Table 1-4 DVD-Multi drive specifica tions (2/2) Panasonic G8CC00012410 Item DVD-ROM mode CD-ROM mode CD-R/CD-RW (Write) ATAPI Burst (Mbytes/s) 33.3 (Ultra DMA mode 2) 16.6 (PIO Mode 4, Multi-word DMA mode 2) Access time (ms) 1/3 Stroke Access (ty p.
.
1.7 Keyboard 1 Hardware Overview 1.7 Keyboard The keyboard is mounted 85(US)/86(UK) keys th at consist of character key and control key, and in conformity with JIS. The keyboard is connected to membrane connector on the system board and controlled by the keyboard controller.
1 Hardware Overview 1.8 TFT Color Display 1.8 TFT Color Display The TFT color display consists of 14 .1/15.0-inch XGA/SXGA+ LCD module and FL inverter board. 1.8.1 LCD Module The LCD module used for the TFT color display uses a backlight as th e light source and can display a maximum of 262,144 colors with 1,024 x 768 or 1,400 x 1,050 resolution.
1.8 TFT Color Display 1 Hardware Overview Table 1-5 LCD module specificati ons (14.1-inch XGA TFT) (1/3) Specifications Item G33C0000 L110 G33C0000 G110 G33C0000 M110 G33C0000 Q110 VF2058 P01 VF2062 P01 Number of Dots 1,024 (W) x 768 (H) Dot spacing (mm) 0.
1 Hardware Overview 1.9 Power Supply 1.9 Power Supply The power supply distributes many different volta ges to the system board and performs the following functions: 1. Input port management • AC adaptor connection • Battery pack installation • The voltage of AC adaptor (both IN and OUT) 2.
1.9 Power Supply 1 Hardware Overview The power supply output rating is specified in table 1-7. Table 1-7 Power supply board output rating Power supplied Yes/No Use Name Voltage (V) Stand by Power off No battery CPU,M1672 PPV 1.55-1.25 NO NO NO CPU VID1R2- P1V 1.
1 Hardware Overview 1.10 Batteries 1.10 Batteries The computer has two types of batteries: Main battery pack RTC battery The battery specifications are listed in table 1-8. Table 1-8 Battery specifications Battery name Material Output voltage Capacity Main battery Lithium-Ion 10.
1.10 Batteries 1 Hardware Overview 1.10.3 Batter y Charging Control Battery charging is controlled by a power s upply microprocessor mounted on the system board. The power supply microprocessor controls wh ether the charge is on or off and detects a full charge when the AC adaptor and battery are attached to the com puter.
1 Hardware Overview 1.10 Batteries 1-30 Satellite A20 Ma intenance Manual (960-444) 1.10.4 RTC battery The RTC battery provides power to keep the cu rrent date, time and other setup information in memory while the computer is turned of f. Table 1-10 lists the charging time and data preservation period of the RTC battery.
Chapter 2 Troubleshooting Procedures.
2 Troubleshooting Procedures 2-ii Satellite A20 Maintenance Manual (960-444).
2 Troubleshooting Procedures Chapter 2 Contents 2.1 Troubleshooting ......................................................................................................... 2-1 2.2 Troubleshooting Flowchart ...........................................
2 Troubleshooting Procedures 2.8 Display Troubleshooting .......................................................................................... 2-44 Procedure 1 External Monitor Check............................................................. 2-44 Procedure 2 Diagnostic Test Program Execution Check .
2 Troubleshooting Procedures Figures Figure 2-1 Troubleshooting flowchart ................................................................................. 2-4 Figure 2-2 Printer port LED................................................................
2 Troubleshooting Procedures 2-vi Satellite A20 Main tenance Manual (960-444).
2.1 Troubleshooting 2 Troubleshooting Procedures 2 2.1 Troubleshooting Chapter 2 describes how to dete rmine if a Field R eplaceable Un it (FRU) in the computer is causing the computer to malfunc tion. The FRUs covered are: 1. System Board 5. Display 9.
2 Troubleshooting Procedures 2.1 Troubleshooting 20. CD-RW media that supports four-speed writi ng and is formatted with DirectCD (m edia manufactured by RICOH or Mitsubi shi Chem ical are recommended). 21. RJ11 connector checker and modular cable or RJ11 connector checker LED 22.
2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart Use the flowchart in Figure 2-1 as a guide for determ ining which trouble shooting procedures to execute.
2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart Figure 2-1 Troubleshooting flowchart (1/2) 2-4 Satellite A20 Ma intenance Manual (96 0-444).
2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures Figure 2-1 Troubleshooting flowchart (2/2) Satellite A20 Main tenance Manual (96 0-444) 2 -5.
2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart If the diagnostics program cannot detect an erro r, the prob lem may be intermittent. Th e Running Test program should be executed several times to isolate the problem .
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting The power supply controls many functions and com ponents. To determine if the power supply is functioning properly, start with Proc edure 1 and continue with the ot her Procedures as instructed.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Table 2-2 DC IN LED DC IN LED Power supply status Lights green DC power is being supplie d from the AC adaptor.
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Procedure 2 Error Code Check If the power supply microprocessor detects a ma lfunction, the DC IN LED blinks orange.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Check 1 Convert the DC IN LED blink patte rn into the hexadecimal error code and compare it to the tables below. The error code begins with the least significan t digit. Error code Error code Where Error occurs 1*h DC-IN (AC Adaptor, DS) AC Adaptor is not connected.
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures DC IN Error code Meaning 10h AC Adaptor output voltage is over 16.5V. 11h Comm on Dock output voltage is over 16.5V. 12h Current from the DC p ower supply is over 13.2A. 13h Current from the DC p ower supply is over 0.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting E5V output Error code Meaning 50h E5V voltage is over 6.00V when the computer is powered on/off. 51h E5V voltage is 4.50V or less when the computer is po wered on. 52h E5V voltage is 4.
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures EMV output Error code Meaning 80h EMV voltage is over 3.00V when the computer is powered on/off. 81h EMV voltage is 1.53V or less whe n the computer is powered on. 82h EMV voltage is 1.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting PPV output Error code Meaning B0h PPV voltage i s over 1.92V when the computer is powered on or off. B1h PPV voltage i s 1.04V or less wh en the computer is powered on. B2h PPV voltage i s 1.
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Check 2 In the case of error code 10h or 12h: Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC IN 15 V socket and wall outlet.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Procedure 3 Connection Check The power supply wiring diagram is shown below: Battery pa ck A C ad ap te r Sys tem boa rd AC power cord A C adap ter c or d Any of the connectors may be di sconnected.
2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Procedure 4 Quick Charge Check The power supply may not charge the battery pack. Perform the following procedures: 1. Reinstall the battery pack. 2. Attach the AC adaptor and turn on the pow er.
2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Procedure 5 Replacement Check The system board or the battery board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures .
2.12 Sound Troubleshooting 2 Troubleshooting Procedures 2.4 System Board Troubleshooting This section describes how to determ ine if th e system board is defective or not functioning properly. Start with Procedure 1 and continue wi th the other procedures as instructed.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Procedure 1 Message Check When the power is turned on, the system performs the Initial Reliability Te st (IRT) installed in the BIOS ROM. The IRT tests each IC on the system board and initia lizes it.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Check 2 The IRT checks the system board. When th e IRT detects an error, the system stops or an error message appears. If one of the following error messages (1) th rough (17), (24) or (25) appears, go to Procedure 4.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Procedure 2 Printer Port LED Check on Boot Mode The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for boot mode. Figure 2-2 shows the printer port LED.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LE D boot mode status (1/8) LED Status Test item Message Register initialization for boot block Clearing software reset b.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LE D boot mode status (2/8) LED Status Test item Message DRAM configuration Enable L1 cache Memory clear (B3h) Transition.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LE D boot mode status (3/8) LED Status Test item Message Initialization of special regist er 00h IRT Check system PIT CH1.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LE D boot mode status (4/8) LED Status Test item Message Setting resume error request (03h) System BIOS ROM to RAM copy (The system halts when an error is detected.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LE D boot mode status (5/8) LED Status Test item Message Storing memory configuration In buffer Reading EC version Update.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LE D boot mode status (6/8) LED Status Test item Message Running a task for waiting the completion of PnP resource creati.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LE D boot mode status (7/8) LED Status Test item Message 13h System memory initialization * LED=14h when an error is dete.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LE D boot mode status (8/8) LED Status Test item Message Waiting for the completion of the clock generator setting (The system halts in LED=1Dh when an error is detected.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Check 1 If any of the following erro r codes display, go to Procedure 4. B0h, B1h, B2h, B3h, B7h, B8h, 00h, 01h, 02h, 03h, 04h, 06h, 07h, 05h, D.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting 2-32 Satellite A20 Ma intenance Manual (960-444) 16. IEEE1394 test 17. Bluetooth test If an error is detected during these tests, go to Procedure 4. Procedure 4 Replacement Check The system board connectors may be dam aged.
2.5 FDD Troubleshooting 2 Troubleshooting Procedures 2 2.5 FDD Troubleshooting This section describes how to determ ine if th e USB FDD is functioning properly. Perform the steps below starting with Procedure 1 and con tinuing with the other pr ocedures as required.
2 Troubleshooting Procedures 2.5 FDD Troubleshooting Procedure 2 Diagnostic Test Program Execution Check Insert the Diagnostics Disk in the USB FDD, tu rn on the computer and run the test. Refer to Chapter 3, Tests and Diagnostics, for more inform ation about th e diagnostics test procedures.
2.5 FDD Troubleshooting 2 Troubleshooting Procedures Procedure 3 Connector Check and Replacement Check The 3.5-inch USB FDD is connected to the system board.
2 Troubleshooting Procedur es 2.6 HDD Troubleshooting 2.6 HDD Troubleshooting This section describes how to determine if th e HDD is functioning properly. Perform the steps below starting with Procedure 1 and continui ng with the other proc edures as required.
2.6 HDD Troubleshooting 2 Troubleshooting Procedures Procedure 2 Partition Check Insert the Toshiba MS-DOS system disk and restar t the computer. Perform the following checks: Check 1 Type C: and press Enter . If you cannot change to the drive C, go to Check 2.
2 Troubleshooting Procedur es 2.6 HDD Troubleshooting Procedure 3 Format Check The computer’s HDD is formatted using the MS -DOS FORMAT program. To format the HDD, follow the steps below. Check 1 Format the HDD and transfer system files using FORMAT C:/S/U .
2.6 HDD Troubleshooting 2 Troubleshooting Procedures Procedure 4 Diagnostic Test Program Execution Check The HDD test program is stored in the diagnostics disk. Perform all of the HDD tests in the Hard Disk Drive Test. Refer to Chapter 3, Tests and Diagnostics, for m ore information about the HDD test program.
2 Troubleshooting Procedur es 2.6 HDD Troubleshooting Procedure 5 Connector Check and Replacement Check The HDD or the system board may be disconnect ed or damaged.
2.7 Keyboard Troubleshooting 2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting To determine if the computer’s keyboard or touch pad is functioning properly, perform the following procedures. Start with Procedure 1 and continue with the other procedures as instructed.
2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting Procedure 2 Connector and Replacement Check The keyboard, touch pad or system board may be disconnected or dam aged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks.
2.8 Display Troubleshooting 2 Troubleshooting Procedures 2.8 Display Troubleshooting This section describes how to determ ine if the co mputer’s display is functioning properly. Start with Procedure 1 and continue with th e other procedures as instructed.
2 Troubleshooting Procedures 2.8 Display Troubleshooting Procedure 3 Connector and Replacement Check The FL, FL inverter, LCD module, and system boar d are connected to the display circuits.
2.9 DVD-ROM and CD-RW/DVD-ROM Troubleshoo ting 2 Troubleshooting Procedures 2.9 CD-RW/DVD, DVD-ROM, DVD- R/-RW, and DVD Multi Drive Troubleshooting This section describes how to determ ine if th e computer’s internal CD-RW/DVD, DVD-ROM, DVD-R/-RW drive, or DVD Multi driv e is functioning properly.
2 Troubleshooting Procedures 2.9 DVD-ROM and CD-RW/DVD-ROM Troubleshooting Procedure 3 Connector Check and Replacement Check The CD-RW/DVD, DVD-ROM, DVD-R/-RW or DVD Multi driv e connects to PJ1820 on the system board. The drive may be disconnected, or the drive or system board may be damaged.
2.10 Modem Troubleshooting 2 Troubleshooting Procedures 2.10 Modem Troubleshooting This section describes how to determ ine if th e computer's m odem is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other proced ures as required.
2 Troubleshooting Procedures 2.10 Modem Troubleshooting Procedure 2 Connector Check and Replacement Check The Modem is installed as a modem daughter card (MDC). If the modem m alfunctions, there may be a bad connection between the MDC a nd the sound board, or the sound board and the system board.
2.11 LAN Troubleshooting 2 Troubleshooting Procedures 2.11 LAN Troubleshooting This section describes how to determ ine if th e computer's LAN port is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other proced ure as required.
2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 2 Connector Check and Replacement Check If the LAN port malfunctions, there may be a bad connection between th e RJ-45 jack and the system board.
2.11 LAN Troubleshooting 2 Troubleshooting Procedures 2.12 Wireless LAN Troubleshooting This section describes how to determine if the computer’s wireless LAN is functioning properly. Perform the steps below starting with Procedure 1 and continuing with other procedures as required.
2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 2 Antennas' Connection Check The wireless LAN function wiri ng diagram is shown below: Antenna cable Left antenna FIR board Right antenna Wireless LAN Card (Mini PCI) System board PJ2200 PJ9500 Any of the connections may be disconnected.
2.11 LAN Troubleshooting 2 Troubleshooting Procedures Procedure 3 Antenna Check Use an antenna test cable to check the an tennas' connection. Follow the steps below. Any of the connections may be disconnected. Disassemble the com puter following the steps described in Chapter 4, perform the following checks.
2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 4 Replacem ent Check Check if the wireless LAN card and the system board are connected properly. Any of these components may be damaged. Disassemble the computer following the steps described in Chapter 4 and replace the board with a new one.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures 2.13 Sound Troubleshooting This section describes how to determine if the computer's sound functions are functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting Procedure 2 Connector Check The sound function wiring diagram is shown below: Sound board PJ6000 P J9600 PJ9601 MDC Line In PJ3010 External micr.
2.12 Sound Troubleshooting 2 Troubleshooting Procedures Procedure 3 Replacement Check Check 1 If the speakers don't sound properly, the le ft or right speaker may be defective or damaged. Replace it with a new one. If the st ereo speakers still do not wo rk properly, go to Check 3.
2 Troubleshooting Procedures 2.12 Sound Troubleshooting 2-58 Satellite A20 Ma intenance Manual (960-444) 2.14 SD Card Slot Troubleshooting This section describes how to determine if the computer’s SD card slot is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.
Chapter 3 Tests and Diagnostics.
3 Tests and Diagnostics 3-ii Satellite A20 Maintenance Manual (960-444).
3 Tests and Diagnostics Chapter 3 Contents 3.1 The Diagnostic Test ................................................................................................... 3-1 3.2 Executing the Diagnostic Test ..............................................
3 Tests and Diagnostics 3-iv Satellite A20 Main tenance Manual (960-444) 3.24.1 Function Description .......................................................................... 3-61 3.24.2 Operations ....................................................
3.1 The Diagnostic Test 3 Tests and Diagnostics 3 3.1 The Diagnostic Test This chapter explains how to use the Diagnostic Test program to test the functions of the computer’s hardware modules. The Diagnostic Test Program is stored on the Diagnostic Disk.
3 Tests and Diagnostics 3.1 The Diagnostic Test You will need the following equipment to perform som e of the Diagnostic test programs. The Diagnostics Disk (all tests) A formatted working dis.
3.2 Executing the Diagnostic Test 3 Tests and Diagnostics 3.2 Executing the Diagnostic Test Toshiba MS-DOS is required to run the DIAGNOSTICS TEST PROGRAM. To start the DIAGNOSTIC TEST PROGRAM, follow these steps: 1. Insert the Diagnostics disk in the floppy disk drive and turn on the computer while pressing U .
3 Tests and Diagnostics 3.2 Executing the Diagnostic Test 2. To execute the DIAGNOSTIC TEST MENU from the DIAGNOSTICS MENU, set the highlight bar to 1 , and press Enter . The following DIAGNOSTIC TEST MENU will appear: TOSHIBA Personal Computer XXXX DIAGNOSTICS Version XXX (c) Copyright TOSHIBA Corp.
3.2 Executing the Diagnostic Test 3 Tests and Diagnostics 3. Select the option you want to execute and press Enter . When “1-SYSTEM TEST” is selected, the following message will appear: SYSTEM TEST XXXXXXX XXXX DIAGNOSTIC TEST VX.
3 Tests and Diagnostics 3.2 Executing the Diagnostic Test 5. The following message will appear: ERROR STOP : YES/NO Then, use the left or right arrow keys to move the cursor to the desired option and press Enter .
3.3 Subtest Names 3 Tests and Diagnostics 3.3 Subtest Names Table 3-1 lists the subtest names for each test program in the DIAGNOSTIC TEST MENU. Table 3-1 Subtest names (1/2) No.
3 Tests and Diagnostics 3.3 Subtest Names Table 3-1 Subtest names (2/2) No. Test Name Subtest No. Subtest Name 7 ASYNC 06 07 FIR/SIR Point to point (send) FIR/SIR Point to point (receive) 8 HARD DISK .
3.4 System Test 3 Tests and Diagnostics 3.4 System Test To execute the System Test select 1 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter. Subtest 01 ROM Checksum This subtest executes a checksum test of the BIOS ROM on the System Board.
3 Tests and Diagnostics 3.4 System Test Subtest 07 DMI read Reads the factory setting for the serial and DMI numbers. Model Name : XXXXXX Version Number : XXXXXX-XXXXX Serial Number : XXXXXXXXXX Model.
3.4 System Test 3 Tests and Diagnostics When the subtest starts, the following message appears on the display: CPU TEMP = XX deg C Throttling level = XXXXh The number of the CPU TEMP indicates the CPU temperature at the m oment in decimal notation. For example, if the num ber is 57, the CPU temperature is 57 degrees.
3 Tests and Diagnostics 3.5 Memory Test 3.5 Memory Test To execute the Memory Test, select 2 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter.
3.5 Memory Test 3 Tests and Diagnostics Subtest 04 Cache Memory To test the cache memory, a pass-through write-read com parison of ‘5A’ data is run repeatedly to the test area (‘7000’:‘Program’ size to ‘7000’:‘7FFF’ (32 KB)) to check the hit-miss ratio (on/off status) for CPU cache mem ory.
3 Tests and Diagnostics 3.6 Keyboard Test 3.6 Keyboard Test To execute the Keyboard Test, select 3 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter .
3.6 Keyboard Test 3 Tests and Diagnostics Subtest 02 Pressed Key Code Display When a key is pressed, the scan code, character code, and key top name are displayed on the screen in the format shown below. The Ins, Caps Lock , Num Lock, Scroll Lock, Alt, Ctrl, Left Shift , and Right Shift keys are displayed in reverse screen mode when pressed.
3 Tests and Diagnostics 3.6 Keyboard Test *** IPS (PAD) TEST (Vx.xx) *** < POINTING > <PARAMETER> STATUS:0018h X-RATE:00FFh Y-RATE:0001H <BUTTON> (1) (2) << PRESS BUTTON1+ BUTT.
3.6 Keyboard Test 3 Tests and Diagnostics If the test ends successfully, OK is displayed. If nothing is displayed, there may be a problem with the USB port. Check the wraparound connection and repeat the test. To check only the USB mouse, follow the procedures below: Connect the USB mouse to the computer’s USB connector.
3 Tests and Diagnostics 3.7 Display Test 3.7 Display Test To execute the Display Test, select 4 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The Display test contains seven subtests that test the display in various modes.
3.7 Display Test 3 Tests and Diagnostics Subtest 04 Gradation & Mode test for VGA This subtest displays gradations for each mode. Execute the test, then press Enter to change the mode. The display below appears on the screen when this subtest is executed.
3 Tests and Diagnostics 3.7 Display Test Pressing Enter changes the size of the displayed image. [ Mode 3 ] Pressing Enter changes the size of the displayed image in the following order: Mode 111 640*.
3.7 Display Test 3 Tests and Diagnostics Subtest 06 “H” Pattern Display This subtest displays a full screen of “H” patterns. HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHH.
3 Tests and Diagnostics 3.8 Floppy Disk Test 3.8 Floppy Disk Test NOTE : Before running the floppy disk test, prepare a formatted work disk. Remove the Diagnostics Disk and insert the work disk into the FDD. Otherwise, the contents of the floppy disk will be erased.
3.8 Floppy Disk Test 3 Tests and Diagnostics Subtest 01 Sequential read This subtest performs a Cyclic Redundancy Check (CRC) that continuously reads all the tracks (track: 0 to 39/0 to 79) on a floppy disk. The start track is specified at the start of the FDD test.
3 Tests and Diagnostics 3.9 Printer Test 3.9 Printer Test To execute the Printer Test, select 6 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The Printer Test contains three subtests that test the output of the printer connected to the computer.
3.9 Printer Test 3 Tests and Diagnostics Subtest 02 Function This subtest is for IBM compatible printers, and tests the following f unctions: Normal print Double-width print Compressed print Emphasize.
3 Tests and Diagnostics 3.9 Async Test 3.10 Async Test To execute the Async Test, select 7 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Async test contains two subtests that test the asynchronous communication functions.
3.11 Hard Disk Test 3 Tests and Diagnostics 3.11 Hard Disk Test To execute the Hard Disk Test, select 8 from the DIAGNOSTIC TEST MENU, press Enter , and follow the directions on the screen. The hard disk test contains ten subtests that test the hard disk drive functions.
3 Tests and Diagnostics 3.9 Async Test HARD DISK TEST XXXXXXX SUB-TEST : XX PASS COUNT : XXXXX ERROR COUNT :XXXXX WRITE DATA : XX READ DATA :XX ADDRESS : XXXXXX STATUS :XXX The first three digits of the ADDRESS indicate which cylinder is being tested, the fourth digit indicates the head and the last two digits indicate the sector.
3.11 Hard Disk Test 3 Tests and Diagnostics Subtest 04 Cross Talk & Peak Shift This subtest writes eight types of worst pattern data (listed below) to a cylinder, then reads the data while moving from cylinder to cylinder.
3 Tests and Diagnostics 3.9 Async Test 3.12 Real Timer Test To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The real timer test contains three Subtests that test the computer’s real timer functions.
3.12 Real Timer Test 3 Tests and Diagnostics Subtest 03 Real Time Carry CAUTION : When you execute this Subtest, the current date and time are erased. This Subtest checks the real time clock increment.
3 Tests and Diagnostics 3.12 NDP Test 3.13 NDP Test To execute the NDP test, select 10 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen.
3 Tests and Diagnostics 3.14 Expansion Test 3 3.14 Expansion Test To execute the expansion test, select 11 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen. The expansion test contains two subtests. NOTE: To execute this subtest, the PC card wraparound connector is required.
3.14 Expansion Test 3 Tests and Diagnostics Subtest 03 RGB monitor ID For this test, the computer must be in CRT m ode. Connect the CRT (an RGB monitor) with the external monitor port.
3 Tests and Diagnostics 3.15 CD-ROM/DVD-ROM Test 3.15 CD-ROM/DVD-ROM Test To execute the CD-ROM/DVD-ROM test, select 13 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the scree n. The CD-ROM/DVD-ROM test contains six Subtests that test the computer’s CD-ROM/DVD-ROM functions.
3.16 Wireless LAN Test (Agere) 3 Tests and Diagnostics 3.16 Wireless LAN Test (Agere) This section describes how to perform the wireless LAN transm itting-receiving test with the test program. Note: Use another computer (with Agere wireless LAN card) that can communicate by the wireless LAN as a reference machine to perform this test.
3 Tests and Diagnostics 3.16 Wireless LAN Test (Agere) Subtest 01 Transmit & Receive test This sub test checks transmit and receive functions. Transmit test Press 1 to select the test and press Enter in the target machine as a responder.
3.16 Wireless LAN Test (Agere) 3 Tests and Diagnostics When the machine has passed the test, “OK” m essage will appear in the test machine. Then press Enter in the target machine; the “OK” me ssage will appear also in the target machine. Press Enter to return to the main menu.
3 Tests and Diagnostics 3.16 Wireless LAN Test (Agere) Press 0 to select the test and press Enter in the target machine. The following message will appear: ############################################################# #### Wireless LAN sub system repair test VX.
3.16 Wireless LAN Test (Agere) 3 Tests and Diagnostics Subtest 02 Mac Address test This subtest reads MAC Address. If there is no problem, the “OK” message will appear. Subtest 03 Wireless LAN (WEP64/128) test This subtest reads the WEP of the wireless LAN card installed in the target machine.
3 Tests and Diagnostics 3.17 Wireless LAN Test (Atheros) 3.17 Wireless LAN Test (Atheros) This section describes how to perform the wireless LAN transm itting-receiving test with the test program. Note: Use another computer (with Atheros wireless LAN card) that can communicate by the wireless LAN as a responder machine to perform this test.
3.17 Wireless LAN Test (Atheros) 3 Tests and Diagnostics Setting the responder machine Note: Release the write-protection of the floppy disk for the test. Insert a floppy disk containing the test program into the FDD for the responder machine and turn on the responder machine.
3 Tests and Diagnostics 3.17 Wireless LAN Test (Atheros) When the tester machine has passed the test, "OK" m essage will appear in the tester machine. Press Enter to return to the main menu. When the tester machine has not passed the test, "NG" m essage will appear in the tester machine.
3.18 Sound/LAN/Modem Test 3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test This section describes how to perform the Sound/LAN/Modem test with the test program . CAUTION : The system is capable of producing high volume sound. When you use a headphone, be careful to set the volume low and adjust it as necessary.
3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test Subtest 01 Microphoned recording & play This subtest checks the function of the CODEC A/D D/A converter. Both the microphone and headphone terminal can be checked at the sam e time. Before executing this subtest, connect an external microphone to the computer.
3.18 Sound/LAN/Modem Test 3 Tests and Diagnostics Copyright (C) 2000 Acer Laboratories Inc. All Rights Reserved. Playback Parameters : Wave File Name = record.
3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test Subtest 03 LAN Test (a) Select 3 to execute and press Enter . The following message will appear: COMPLETED Repeat count = 00000 Error count = 00000 XXXX (XXXXX) LAN TEST Vol.
3.18 Sound/LAN/Modem Test 3 Tests and Diagnostics Subtest 04 Modem Test (a) Select 4 to execute and press Enter . The following message will appear: MDC Test Program [PCB (MDC I/F) Test] for M1535 plus Version X.
3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test Subtest 05 USB 2.0 The subtest is executed, the following message appears. ((( USB Test Program for UPD720100GM-8ED System [Ver.2.00] ))) (C) Copyright TOSHIBA Corporation, 2001-2002. All rights reserved.
3.19 Error Code and Error Status Names 3 Tests and Diagnostics 3.19 Error Code and Error Status Names Table 3-2 lists the error codes and error status names for the Diagnostic Test.
3 Tests and Diagnostics 3.19 Error Code and Error Status Names Table 3-2 Error codes and error status names (2/3) Device name Error code Error status name FDD 01 02 03 04 06 08 09 10 20 40 60 80 EE Ba.
3.19 Error Code and Error Status Names 3 Tests and Diagnostics Table 3-2 Error codes and error status names (3/3) Device name Error code Error status name NDP 01 02 03 04 05 06 No Co-Processor Control.
3 Tests and Diagnostics 3.20 Hard Disk Test Detail Status 3.20 Hard Disk Test Detail Status When an error occurs in the hard disk test, the following message is displayed: HDC status = XXXXXXXX Detailed information about the hard disk test error is displayed on the screen by an eight-digit number.
3.20 Hard Disk Test Detail Status 3 Tests and Diagnostics Table 3-4 Error register contents Bit Name Description 7 BBK1 (Bad block mark) “0” … Not used “1” … A bad block mark is detected. 6 UNC (Uncorrectable) “0” … There is no uncorrectable data error.
3 Tests and Diagnostics 3.21 Head Cleaning 3.21 Head Cleaning 3.21.1 Function Description This function cleans the heads in the FDD by executing a series of head load/seek and read operations. A cleaning kit is necessary to perform this program. 3.21.
3.22 Log Utilities 3 Tests and Diagnostics 3.22 Log Utilities 3.22.1 Function Description This function logs error information generated while a test is in progress and stores the results in RAM. This function can store data on a floppy disk or output the data to a printer.
3 Tests and Diagnostics 3.22 Log Utilities 2. The error information displayed on the screen can be manipulated by the following number keys: 1 scrolls the display to the next page. 2 scrolls the display to the previous page. 3 returns to the Diagnostic Menu.
3.23 Running Test 3 Tests and Diagnostics 3.23 Running Test 3.23.1 Function Description This function automatically executes the following tests in sequence: 1. System test (subtest 01) 2. Memory test (subtests 01, 02, 04, and 06) 3. Real timer test (subtest 02) 4.
3 Tests and Diagnostics 3.23 Running Test 4. Select No and press Enter . The following message will appear: Mount the work disk(s) on the drive(s), then press [Enter] key. [Warning : The contents of the disk(s), will be destroyed.] 5. This program is executed continuously.
3.24 Floppy Disk Drive Utilities 3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 3.24.1 Function Description This function formats the FDD, copies the floppy disk and displays the dump list for both the FDD and HDD. 1. FORMAT NOTE : This program is only for testing a floppy disk drive.
3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 3.24.2 Operations 1. Selecting 7 from the DIAGNOSTIC MENU and pressing Enter displays the following message: [ FDD UTILITIES ] 1 - FORMAT 2 - COPY 3 - DUMP 4 - HDD ID READ 9 - EXIT TO DIAGNOSTICS MENU 2.
3.24 Floppy Disk Drive Utilities 3 Tests and Diagnostics 3. COPY program (a) When COPY is selected, the following message appears: FLOPPY DISK FORMAT & COPY : VX.XX Type select (0:2DD,3:2HD) ? (b) Selecting a media/drive type number will display a message similar to the one below: Insert source disk into drive A: Press any key when ready.
3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 4. DUMP program (a) When DUMP is selected, the following message appears: DIAGNOSTICS-HARD DISK & FLOPPY DISK DUMP : VX.XX Drive type select (1:FDD, 2:HDD) ? (b) When FDD is selected, the following message appears.
3.24 Floppy Disk Drive Utilities 3 Tests and Diagnostics Satellite A20 Maintenance Manual (960-444) 3-65 5. HDD-ID READ Selecting HDD ID READ displays th e following HDD ID configuration: [HDD ID Read (VX.XX)] [Drive #X] ID code (h) = XXXX No. of Cylinders = XXXX XXXX Removable Cylinders = XXXX XXXX No.
3 Tests and Diagnostics 3.25 System Configuration 3 3.25 System Configuration 3.25.1 Function Description The System Configuration program contains th e following configuration information for the computer: 1. Processor Type 2. VGA Controller 3. MS-DOS Version 4.
3.25 System Configuration 3 Tests and Diagnostics 3.25.2 Operations Selecting 8 from the DIAGNOSTIC MENU and pressing Enter displays the following system configuration: System Configuration Display : Ver X.XX [Machine Name ???] * - Processor Type = XXXX **- VGA Controller = XXXX * - MS-DOS Version = VX.
3 Tests and Diagnostics 3.26 SETUP 3.26 SETUP 3.26.1 Function Description This program displays the current system setup inform ation as listed below: 1. Memory (a) Total 2. Password 3. Battery (a) Battery Save Mode 4. Peripheral (a) Internal Pointing Device (b) Parallel Port Mode (c) Hard Disk Mode 5.
3.26 SETUP 3 Tests and Diagnostics 11. Legacy Emulation (a) USB keyboard/Mouse Legacy Emulation (b) USB-FDD Legacy Emulation 12. PC Card (a) Controller Mode 13.
3 Tests and Diagnostics 3.26 SETUP 3.26.2 Accessing the SETUP Program Selecting 0 from the DIAGNOSTICS MENU and pressing Enter displays the TSETUP screen. The TSETUP screen is divided into two pages: SYSTEM SETUP (1/2) and SYSTEM SETUP (2/2). SYSTEM SETUP (1/2) ACPI BIOS version = x.
3.26 SETUP 3 Tests and Diagnostics NOTE: 1. Panel Power On/Off item appears only when the Power-up Mode is in Resume mode. 2. The USB FDD Legacy Emulation item appears under the LEGACY EMULATION item only when Floppy Disk I/O is set to Disabled.
3 Tests and Diagnostics 3.26 SETUP Moving Within the SETUP Menu and Changing Values 1. Press Å and Æ to move between the two colum ns. Press PgDn and PgUp to move between the two pages. Press ↑ and ↓ to move between items in a colum n. 2. Press either the space bar to change the value.
3.26 SETUP 3 Tests and Diagnostics SETUP Options The SETUP screen is divided into functionally related groups. This section describes each group and its options. 1. Memory This group of options displays the computer’s mem ory. (a) Total This field displays the total amount of mem ory installed and is automatically calculated by the computer.
3 Tests and Diagnostics 3.26 SETUP Display Auto Off Use this option to disable or set the duration of the display automatic power off function. This function causes the computer to turn the LCD panel’s illumination off if you make no entry for the set period of tim e.
3.26 SETUP 3 Tests and Diagnostics 4. Peripheral Use this option to select the parallel port mode and hard disk mode. (a) Internal Pointing Device This option enables and disables the Touch Pad. Enabled Enables the Touch Pad. (Default) Disabled Disables the Touch Pad.
3 Tests and Diagnostics 3.26 SETUP 5. Display This group of options configures the computer’s display. (a) Power On Display This option is used to select the display when booting up. Auto-Selected Selects an external monitor if one is connected. Otherwise it selects the internal LCD.
3.26 SETUP 3 Tests and Diagnostics 6. Boot Priority This tab sets the priority for booting the computer and the priority for the built-in HDD or optional secondary HDD. (a) Boot Priority HDD → FDD → CD-ROM → LAN: The computer looks for bootable files in the following order: HDD,FDD, CD- ROM and LAN.
3 Tests and Diagnostics 3.26 SETUP (c) Network Boot Protocol Use this option to set the starting method via a network. PXE Sets to PXE protocol (Default) RPL Sets to PRL protocol 7. Others Whether or not you need to configure the computer with these options depends primarily on the kind of software or peripherals you use.
3.26 SETUP 3 Tests and Diagnostics Use this option to set a time and date for automatic power on and enable or disable the ring indicator feature. Ring Indicator displays only when the computer is in Resume m ode and the Alarm Date Option displays when Alarm Time is enabled.
3 Tests and Diagnostics 3.26 SETUP 9. Configuration This field displays the configuration method. The devices are initialized when the PNP OS loads. Setup by OS First, devices necessary for loading the OS will be initialized. After the PNP OS loads, other devices will be initialized by the OS.
3.26 SETUP 3 Tests and Diagnostics When the Printer Port Mode (see settings below) is set to ECP , the DMA channel can also be set to 1 , 2 or 3 . The default is 3.
3 Tests and Diagnostics 3.26 SETUP 11. PCI Bus This item displays the interrupt level for the Card Bus. It is for information only and cannot be changed. PCI BUS = IRQ11 12. Legacy Emulation. (a) USB keyboard/Mouse Legacy Emulation. Use this option to enable or disable USB KB/Mouse Legacy Emulation.
3.26 SETUP 3 Tests and Diagnostics (b) CD-ROM Secondary IDE (170H/IRQ15) (c) PC Card When an ATA card is installed in IN13h, the sub window below is displayed. Built-in HDD = Primary IDE (1F0H/IRQ14) ATA Card = Others (190H/IRQ) DRIVES I / O 15. PCI LAN (Not used) This option enables/disables the Built-in LAN functions.
3 Tests and Diagnostics 3.26 SETUP 3-84 Satellite A20 Maintenance Manual (960-444).
Chapter 4 Replacement Procedures.
4 Replacement Procedures 4-ii Satellite A20 Maintenance Manual (960-444).
4 Replacement Procedures Chapter 4 Contents 4.1 General .................................................................................................................... ... 4-1 4.2 Battery Pack .....................................................
4 Replacement Procedures 4.30.1 Replacing the 15.0-inch XGA LG.Philips Fluorescent Lamp ........... 4-83 4.30.2 Replacing the 15.0-inch XGA Samsung Fluorescent Lamp .............. 4-94 4.30.3 Replacing the 15.0-inch XGA Sharp Fluorescent Lamp.........
4 Replacement Procedures Figure 4-17 Removing the Keyboard support plate ........................................................ 4-33 Figure 4-18 Removing the Memory m odule ................................................................... 4-35 Figure 4-19 Removing the Wireless LAN card cover .
4 Replacement Procedures Figure 4-50 Replacing LG.Philips fl uorescent lamp (XGA) (1) ..................................... 4-84 Figure 4-51 Replacing LG.Philips fl uorescent lamp (XGA) (2) ..................................... 4-85 Figure 4-52 Replacing LG.
4 Replacement Procedures Figure 4-82 Replacing Sharp fluor escent lamp (XGA) (16) ......................................... 4-119 Figure 4-83 Replacing Sharp fluor escent lamp (XGA) (17) ......................................... 4-120 Figure 4-84 Replacing Sharp fluor escent lamp (XGA) (18) .
4 Replacement Procedures Figure 4-114 Replacing Sharp fluorescent lamp (SXGA+) (2) ....................................... 4-156 Figure 4-115 Replacing Sharp fluorescent lamp (SXGA+) (3) ....................................... 4-157 Figure 4-116 Replacing Sharp fluorescent lamp (SXGA+) (4) .
4 Replacement Procedures Figure 4-146 Folding down the TAB .............................................................................. 4-188 Figure 4-147 Setting the bezel ............................................................................
4 Replacement Procedures 4-x Satellite A20 Maintenance Manual (960-444).
4.1 General 4 Replacement Procedures 4 Replacement Procedures 4.1 General This section explains how to disassemble the computer and replace Field Replaceable Units (FRUs). It may not be necessary to remove all the FRUs in order to replace one. The chart below is a guide to which FRUs need to be removed in order to remove others.
4 Replacement Procedures 4.1 General Safety Precautions Before you begin disassembly, read the following safety precautions and observe them carefully as you work. DANGER: 1. Always use the genuine battery that is authorized by Toshiba or compatible with the unit.
4.1 General 4 Replacement Procedures Before You Begin Look over the procedures in this section before you begin disassembling the computer. Familiarize yourself with the disassembly and reassem bly steps. Begin each procedure by removing the AC adapter and the battery pack as instructed in this section: 1.
4 Replacement Procedures 4.1 General Disassembly Procedures The computer has two basic types of cable connectors: • Pressure Plate Connectors • Coaxial Cable Connectors • Normal Pin Connectors T.
4.1 General 4 Replacement Procedures Tools and Equipment The use of Electrostatic Discharge (ESD) equipment is very important for your safety and the safety of those around you. Proper use of these devices will increase the success rate of your repairs and lower the cost for damaged or destroyed parts.
4 Replacement Procedures 4.1 General Screw Tightening Torque When you fasten screws, be sure to follow the torque list below. CAUTION: Overtightening can damage components and screws; undertightening can result in electrical shorts or other damage if screws or components come loose.
4.1 General 4 Replacement Procedures Color of Screw Shaft To avoid mistakes on the screw length, screw shafts are colored as follows: Even number length screw: brown Odd number length screw: white Special length screw: blue Screws whose lengths are indicated to one or more decimal places such as 2.
4 Replacement Procedures 4.2 Battery Pack 4.2 Battery Pack Removing the Battery Pack To remove the battery pack, follow the steps below and refer to figure 4-1.
4.2 Battery Pack 4 Replacement Procedures Installing the Battery Pack To install the battery pack, follow the steps below and refer to figures 4-1. CAUTION: The battery pack is a lithium ion battery, which can explode if not properly replaced, used, handled or disposed of.
4 Replacement Procedures 4.3 Optional PC Card 4.3 Optional PC Card Removing an Optional PC Card To remove a PC card (option), follow the steps below and refer to figure 4-2. CAUTION: Before you remove a PC card, refer to the card's documentation and to your operating system documentation for proper procedures and precautions.
4.3 Optional PC Card 4 Replacement Procedures Installing an Optional PC Card To install a PC card, follow the steps below and refer to figure 4-2. 1. Insert a PC card.
4 Replacement Procedures 4.4 Optional SD Card 4.4 Optional SD Card Removing an Optional SD Card To remove an SD card (option), follow the steps below and refer to figure 4-3. CAUTION: Before you remove an SD card, refer to the card's documentation and to your operating system documentation for proper procedures and precautions.
4.5 HDD 4 Replacement Procedures 4.5 HDD CAUTION : When handling the HDD, do not press the top surface as shown by the arrow. Hold it by the sides. HDD Removing the HDD To remove the HDD, follow the steps below and refer to figures 4-4 to 4-6. 1. Turn the computer upside down.
4 Replacement Procedures 4.5 HDD 3. Lift up the HDD cover. 4. Pull the guide of the HDD and remove the HDD. Be careful not to damage the connector. HDD pack Guide Figure 4-5 Removing the HDD pack 4-14.
4.5 HDD 4 Replacement Procedures NOTE: The following steps describe how to disassemble the HDD pack; however, do not disassemble if the HDD is working properly. 5. Place the HDD pack on a flat surface, and remove the following screws. • M3 × 4 FLAT screw × 4 6.
4 Replacement Procedures 4.5 HDD Installing the HDD To install the HDD, follow the steps below and refer to figures 4-4 to 4-6. CAUTION: Do not hold the HDD by its top and bottom flat surfaces. It may damage the HDD. 1. Fit the aluminum cover to the HDD.
4.6 Modem Daughter Card 4 Replacement Procedures 4.6 Modem Daughter Card Removing the Modem Daughter Card To remove the modem daughter card, follow the steps below and refer to figure 4-7. 1. Remove the following screws securing the modem daughter card.
4 Replacement Procedures 4.6 Modem Daughter Card Installing the Modem Daughter Card To install the modem daughter card, follow the steps below and refer to figure 4-7. 1. Carefully connect the modem cable to JP1 on the modem daughter card. 2. Turn over the insulator on the modem daughter card slot.
4.7 ODD 4 Replacement Procedures 4.7 ODD Removing the ODD To remove the ODD, follow the steps below and refer to figures 4-8 and 4-9. CAUTION: The ODD can become hot with use. Be careful when removing the module. 1. Remove the following screw securing the ODD cover.
4 Replacement Procedures 4.7 ODD 3. Carefully slide the ODD to the side of the computer. M2.5 × 4 SUPER FLA T screws ODD Figure 4-8 Removing the ODD 4-20 Satellite A20 Main tenance Manual (960-444).
4.7 ODD 4 Replacement Procedures 4. Remove the following screws and the plastic frame. • M2 × 3 SUPER FLAT screw × 4 • M2 × 5 SUPER FLAT screw × 1 M2 × 3 SUPER FLA T screw Frame M2 × 3 SUPER.
4 Replacement Procedures 4.7 ODD Installing the ODD To install the ODD, follow the steps below and refer to figures 4-8 and 4-9. 1. Seat the plastic frame on the side of the ODD, and secure it with the following screws. • M2 × 3 SUPER FLAT screw × 4 • M2 × 5 SUPER FLAT screw × 1 2.
4.8 Cooling Fan 4 Replacement Procedures 4.8 Cooling Fan Removing the Cooling Fan To remove the cooling fan, follow the steps below and refer to figure 4-10. NOTE : A filter is attached to the back of the fan cover to prevent dust or dirt from entering inside of the computer.
4 Replacement Procedures 4.8 Cooling Fan 5. Disconnect the fan cable from PJ9900 on the system board. M2.5 × 6 FLA T HEAD scr ew M2.5 × 4 FLA T HEAD screw PJ9900 Fan M2.
4.8 Cooling Fan 4 Replacement Procedures Installing the Cooling Fan To install the cooling fan, follow the steps below and refer to figures 4-10. CAUTION: Before installing the fan cover, vacuum off dust or dirt on the indentation of the filter attached to the fan cover.
4 Replacement Procedures 4.9 CPU 4.9 CPU Removing the CPU To remove the CPU, follow the steps below and refer to figures 4-11 to 4-14. CAUTION: When you remove the CPU, wipe the grease off of the bottom of the heat sink, bottom of the cooling fan and top of the CPU.
4.9 CPU 4 Replacement Procedures 2. Remove the fan cover and fan. NOTE: To remove the fin, the fan cover and fan must be removed. For removing the fan cover and fan, refer to 4.8 Cooling Fan . 3. Remove the following screws securing the fin and remove the fin by lifting it up directly above.
4 Replacement Procedures 4.9 CPU 4. Turn the cam to the unlock position with a flat-blade screwdriver to unlock the CPU. Figure 4- 13 Unlocking the CPU 4.
4.9 CPU 4 Replacement Procedures Installing the CPU To install the CPU, follow the steps below and refer to figures 4-11 to 4-14. 1. Make sure the cam is in the open position. 2. Seat the CPU in the CPU socket. Make sure the alignment is exact to avoid damaging pins on the CPU.
4 Replacement Procedures 4.9 CPU 4-30 Satellite A20 Main tenance Manual (960-444) 5. Place the fin and secure it with the following screws. • M2 × 18 BIND screw × 2 6. Install the fan and fan cover. NOTE: To remove the fin, the fan cover and fan must be removed.
4.10 Keyboard 4 Replacement Procedures 4 Replacement Procedures 4.10 Keyboard Removing the Keyboard To remove the keyboard, follow the steps below and refer to figures 4-15 to 4-17.
4 Replacement Procedures 4.10 Keyboard 3. Remove the following screws securing the keyboard. • M2.5 × 4 FLAT HEAD screw × 2 4. Remove the following screw securing the keyboard hold plate and remove the keyboard hold plate. • M2.5 × 4 FLAT HEAD screw × 1 M2.
4.10 Keyboard 4 Replacement Procedures 5. Rotate out the keyboard and lay it on top of the palm rest. 6. Remove the following screw securing the keyboard support plate and remove the keyboard support plate. • M2.5 × 6 FLAT HEAD screw × 1 PJ3230 M2.
4 Replacement Procedures 4.10 Keyboard Installing the Keyboard To install the keyboard, follow the steps below and refer to figures 4-15 to 4-17. 1. Seat the keyboard face down on the palm rest. 2. Connect the keyboard cable to PJ3230 on the system board.
4.11 Memory Module 4 Replacement Procedures 4.11 Memory Module Removing a Memory Module To remove a mem ory module, make sure the com puter is in boot mode and powered off, follow the steps below and refer to figures 4-18. CAUTION: Do not try to remove a memory module with the computer turned on.
4 Replacement Procedures 4.11 Memory Module Installing a Memory Module To install a memory m odule, make sure that the computer is in boot m ode and powered off, follow the steps below and refer to figure 4-18. CAUTION: 1) Do not install a memory module in slot B only.
4.12 Wireless LAN Card 4 Replacement Procedures 4.12 Wireless LAN Card Removing the Wireless LAN Card To remove the wireless LAN card, make sure the com puter is in boot mode and powered off, follow the steps below and refer to figures 4-19 and 4-20. NOTE: The wireless LAN card is an option in some models.
4 Replacement Procedures 4.12 Wireless LAN Card 3. Disconnect the wireless LAN antenna cables (black and white) from the wireless LAN card using an antenna coaxial cable disconnector. PJ2200 W ireless LAN card W ireless LAN antenna cables (black and white) Ke yboard insulator (black) Figure 4-20 Removing the Wireless LAN card 4.
4.12 Wireless LAN Card 4 Replacement Procedures Installing the Wireless LAN Card To install the wireless LAN card, make sure that the computer is in boot m ode and powered off, follow the steps below and refer to figure 4-21. CAUTION: Be sure to switch the computer off before removing the wireless LAN card.
4 Replacement Procedures 4.13 Bluetooth 4.13 Bluetooth Removing the Bluetooth To remove the Bluetooth, follow the steps below and refer to figure 4-21. CAUTION: Do not try to remove the Bluetooth module with the computer turned on. You can damage the computer or Bluetooth module.
4.13 Bluetooth 4 Replacement Procedures M2 × 3 SUPER FLA T screw Bluetooth SUMI card Bluetooth module Bluetooth coaxial cable PJ4900 Figure4-21 Removing the Bluetooth module Installing the Bluetooth To install the Bluetooth, follow the steps below and refer to figure 4-21.
4 Replacement Procedures 4.14 Top Cover with Display Assembly 4.14 Top Cover with Display Assembly Removing the Top Cover with Display Assembly To remove the top cover with display assembly, follow the steps below and refer to figures 4-23 and 4-24. 1.
4.14 Top Cover with Display Assembly 4 Replacement Procedures 2. Disconnect the sub fan cable from PJ8770 on the system board. 3. Turn the computer face up and open the display panel. 4. Remove the following screws securing the top cover. • M2.5 × 6 FLAT HEAD screw × 4 5.
4 Replacement Procedures 4.14 Top Cover with Display Assembly Installing the Top Cover with Display Assembly To install the top cover with display assembly, follow the steps below and refer to figures 4-23 and 4-24. 1. Install the top cover on the display assembly.
4.15 Touch Pad 4 Replacement Procedures 4.15 Touch Pad Removing the Touch Pad To remove the touch pad, follow the steps below and refer to figure 4-25. 1. Disconnect the touch pad SUMI card from PJ3240 on the system board. 2. Remove the following screw securing the touch pad.
4 Replacement Procedures 4.15 Touch Pad Installing the Touch Pad To install the touch pad, follow the steps below and refer to figure 4-25. 1. Connect the touch pad SUMI card to J1 on the touch pad, if necessary. 2. Seat the touch pad. 3. Secure the touch pad with the following screw.
4.16 Front Membrane ASSY 4 Replacement Procedures 4.16 Front Membrane ASSY Removing the Front Membrane ASSY To remove the front mem brane ASSY, follow the steps below and refer to figure 4-26. 1. Disconnect the front membrane cable from PJ3260 on the system board.
4 Replacement Procedures 4.16 Front Membrane ASSY Installing the Front Membrane ASSY To install the front membrane ASSY, follow the steps below and refer to figures 4-26. 1. Place the front membrane ASSY and front mem brane holder on it, and secure them with the following screws.
4.17 FIR Board 4 Replacement Procedures 4.17 FIR Board Removing the FIR Board To remove the FIR board, follow the steps below and refer to figure 4-27. 1. Remove the following screws securing the FIR board. • M2.5 × 6 FLAT HEAD screws × 2 2. Disconnect the FIR board from PJ9500 on the system board.
4 Replacement Procedures 4.17 FIR Board Installing the FIR Board To install the FIR board, follow the steps below and refer to the figure 4-27. 1. Connect the FIR board to PJ9500 on the system board. 2. Check the position of the wireless communication switch on the FIR board and the switch on the system chassis.
4.18 Sound Board 4 Replacement Procedures 4.18 Sound Board Removing the Sound Board To remove the sound board, follow the steps below and refer to figure 4-28. 1. Disconnect the sound board SUMI card from PJ9510 and PJ9511 on the system board. 2. Remove the following screw securing the sound board.
4 Replacement Procedures 4.18 Sound Board Installing the Sound Board To install the sound board, follow the steps below and refer to figure 4-28. 1. Connect the sound board SUMI card to PJ9600 and PJ9601 on the sound board. 2. Seat the sound board. When seating, insert three jacks on the sound board into the holes of the chassis first.
4.19 RTC Battery 4 Replacement Procedures 4.19 RTC Battery WARNING: When replacing the RTC battery, be sure to use genuine batteries or replacement batteries authorized by Toshiba. Installing the wrong battery could cause a battery explosion or other damage.
4 Replacement Procedures 4.19 RTC Battery Removing the RTC Battery To remove the RTC battery, follow the steps below and refer to figure 4-29. 1. Disconnect the RTC battery cable from PJ9999 on the system board. 2. Pull the hook on each side fixing the RTC battery outward and lift out the RTC battery.
4.20 DC-IN Jack 4 Replacement Procedures Satellite A20 Maintenan ce Manual (960-444) 4-55 4.20 DC-IN Jack Removing the DC-IN Jack To remove the DC-IN jack, follow the steps below and refer to figure 4-30. 1. Disconnect the DC-IN cable from PJ8800 on the system board.
4 Replacement Procedures 4.21 System Board 4 Replacement Procedures 4.21 System Board Removing the System Board To remove the system board, follow the steps below and refer to figure 4-31. 1. Remove the following screws securing the plastic holder and the system board.
4.21 System Board 4 Replacement Procedures Installing the System Board To install the system board, follow the steps below and refer to figures 4-31. 1. Install the key bracket on the left side of the chassis. 2. Set the modem jack and hook the cable under the guides.
4 Replacement Procedures 4.22 Sub Fan 4.22 Sub Fan Removing the Sub Fan To remove the sub fan board, follow the steps below and refer to figure 4-32. 1. Remove the following screws securing the sub fan. • M2.5 × 6 FLAT HEAD screw × 2 2. Remove the sub fan.
4.22 Sub Fan 4 Replacement Procedures Installing the Sub Fan To install the sub fan board, follow the steps below and refer to figures 4-32. 1. Place the sub fan. 2. Pass the sub fan cable in the hole of the chassis. 3. Secure the sub fan with the following screws.
4 Replacement Procedures 4.23 PC Card Slot 4.23 PC Card Slot Removing the PC Card Slot To remove the PC card slot, follow the steps below and refer to figure 4-33. 1. Lay the system board face up. 2. Remove the following screws securing the PC card slot.
4.23 PC Card Slot 4 Replacement Procedures Installing the PC card slot To install the PC card slot, follow the steps below and refer to figure 4-33. 1. Lay the system board face down and seat the PC card slot. 2. Press the PC card slot to connect it to PJ2110.
4 Replacement Procedures 4.24 Speakers 4.24 Speakers Removing the Speakers To remove the speakers, follow the steps below and refer to figures 4-34 and 4-35. 1. Lay the top cover and display assembly face down and remove the insulator. 2. Remove the following screws securing the side covers.
4.24 Speakers 4 Replacement Procedures 3. Remove the two tapes securing the speaker cables. 4. Remove the speakers and speaker cables from their guides.
4 Replacement Procedures 4.25 Touch Pad Switch 4.25 Touch Pad Switch Removing the Touch Pad Switch To remove the touch pad switch, follow the steps below and refer to figure 4-36. 1. Remove the following screws securing the touch pad switch. • M2.5 × 4 TAPPING screw × 3 2.
4.26 Display Mask 4 Replacement Procedures 4.26 Display Mask Removing the Display Mask To remove the display mask, follow the steps below and refer to figures 4-37 and 4-38. 1. Remove the two mask seals at the lower part of the display mask. 2. Remove the following screws securing the display mask.
4 Replacement Procedures 4.26 Display Mask 4. Remove the display mask. Display M ask Figure 4-38 Removing the Display mask (2) Installing the Display Mask To install the display mask, follow the steps below and refer to figures 4-37 and 4-38. 1. Place the display mask in its position.
4.27 FL Inverter 4 Replacement Procedures 4.27 FL Inverter Removing the FL Inverter To remove the FL inverter, follow the steps below and refer to figure 4-39. 1. Remove the following screw securing the FL inverter. • M2 × 6 SUPER FLAT screw × 1 2.
4 Replacement Procedures 4.27 FL Inverter Installing the FL Inverter To install the FL inverter, follow the steps below and refer to figure 4-39. 1. Connect the FL cable and the HV cable to the FL inverter. 2. Seat the FL inverter board and stick the insulator on the FL inverter of the FL cable side.
4.28 LCD Module 4 Replacement Procedures 4.28 LCD Module NOTE: Be careful not to apply pressure to the ICs along the edge of LCD module. The ICs are easily damaged. NOTE: For environmental reasons, do not throw away a malfunctioning LCD module (or FL).
4 Replacement Procedures 4.28 LCD Module 5. Disconnect the LCD cable and remove the LCD module. Glass ta pe M2 × 5 SUPER FLA T screw Connector Copper tape (SXGA+ models only) Figure 4-40 Removing the.
4.28 LCD Module 4 Replacement Procedures 6. Remove the following screw securing the two metal braces to the LCD module. • M2 × 3 SUPER FLAT screw × 4 M2 × 3 SUPER FLA T scr ew M2 × 3 SUPER FLA T.
4 Replacement Procedures 4.28 LCD Module Installing the LCD Module To install the LCD module, follow the steps below and refer to figures 4-40 and 4-41. 1. Secure the two metal braces to the LCD module with the following screws. • M2 × 3 SUPER FLAT screw × 4 2.
4.29 Wireless LAN Antenna/Bluetooth Antenna/Di splay Cover 4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover Removing the Wireless LAN Antenna/Bluetooth Antenna/Display Cover To remove the wireless LAN antenna/Bluetooth antenna/display cover, follow the steps below and refer to figures 4-42 to 4-48.
4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 2. (For Wireless LAN/Bluetooth models only) Peel off the three acetate tapes securing the wireless LAN antenna cables and Bluetooth antenna cable and remove the wireless LAN antennas and Bluetooth antenna from the display cover.
4.29 Wireless LAN Antenna/Bluetooth Antenna/Di splay Cover 4 Replacement Procedures 3. Remove the following screw securing the metal plate on the LCD cable and remove the metal plate.
4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4. Turn the display cover face down and remove the insulator. 5. Remove the following screws securing the cable hold plate and cable earth plate. • M2.5 × 6 TAPPING screw × 2 Cable ho ld plate M 2.
4.29 Wireless LAN Antenna/Bluetooth Antenna/Di splay Cover 4 Replacement Procedures 7. Remove the LCD cable from the display assembly. LCD cable Figure 4-46 Removing the LCD cable (2) Satellite A20 Ma.
4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 8. Remove the following screws securing the two hinges to the display cover. • M2.5 × 4 FLAT HEAD screw × 2 • M2.5 × 5 FLAT HEAD screw × 4 M2.5 × 4 FLA T BIND screw M2.
4.29 Wireless LAN Antenna/Bluetooth Antenna/Di splay Cover 4 Replacement Procedures 9. Remove the display cover from the display assembly. 10. Remove the following screws securing the two hinges to the display cover. • M2.5 × 6 FLAT HEAD screw × 4 M2.
4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover Installing the Wireless LAN Antenna/Bluetooth Antenna/Display Cover To install the wireless LAN antenna/Bluetooth antenna/display cover, follow the steps below and refer to figures 4-42 to 4-49.
4.29 Wireless LAN Antenna/Bluetooth Antenna/Di splay Cover 4 Replacement Procedures Satellite A20 Maintenan ce Manual (960-444) 4-81 3. Pass the LCD cable through the hole from the top of the display assembly toward its bottom. 4. Close the display cover and turn the display assembly face down.
4 Replacement Procedure 4.30 Fluorescent Lamp 4 4.30 Fluorescent Lamp This system uses LCD modules from the following suppliers. The procedure for replacing the fluorescent lamp is different for each LCD module. Refer to the appropriate procedure. Type Part No.
4.30 Fluorescent Lamp 4 Replacement Procedure 4.30.1 Replacing the 15.0-inch XGA LG.Philips Fluorescent Lamp CAUTION : When replacing the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD panel. Be careful not to let dust or other foreign substance into the module.
4 Replacement Procedure 4.30 Fluorescent Lamp Cover sh ield (C) T ape shield A dhesive tape Cover sh ield (G) A dhesive tape Figure 4-50 Replacing LG.Philips fluorescent lamp (XGA) (1) 4-84 Satellite .
4.30 Fluorescent Lamp 4 Replacement Procedure 2. Remove the top case. Be careful not to apply excessive force to the top case and gate TCP. To p c a s e Figure 4-51 Replacing LG.
4 Replacement Procedure 4.30 Fluorescent Lamp 3. Remove the source PCB and gate PCB. 1) Remove the source PCB. Be careful not to apply excessive force to the PCB or TCP when removing the double-sided tape. 2) Remove the gate PCB. Be careful not to apply excessive force to the PCB or TCP when removing the double-sided tape.
4.30 Fluorescent Lamp 4 Replacement Procedure 4. Remove the board assembly, adhesive tape, light guide and cover assembly bottom (L). 1) Remove the board assembly. 2) Remove the adhesive tape securing the sheets (four points). 3) Remove the sheets and light guide.
4 Replacement Procedure 4.30 Fluorescent Lamp Assembling the 15.0-inch XG A LG.Philips Fluorescent Lamp To assemble the 15.0-inch XGA LG.Philips fluorescent lamp, follow the steps below and refer to figures 4-54 to 4-57. 1. Install the cover assembly bottom (L), sheets, light guide, adhesive tape and board assembly.
4.30 Fluorescent Lamp 4 Replacement Procedure Board asse mbly Double-sided tape A dhesive tape Sheets and LGP Double-sided tape A dhesive tape Double-sided tape A dhesive tape Double-s ided tap e A dhesive tape Screw Cover assembly bottom (L) Screw Figure 4-54 Replacing LG.
4 Replacement Procedure 4.30 Fluorescent Lamp 2. Install the source PCB and gate PCB. 1) Install the source PCB. NOTE: Be careful not to apply excessive force to the TCP. 2) Install the gate PCB. NOTE: Be careful not to apply excessive force to the TCP.
4.30 Fluorescent Lamp 4 Replacement Procedure 3. Install the top case. NOTE: Be careful not to apply excessive force to the gate TCP. To p c a s e Figure 4-56 Replacing LG.
4 Replacement Procedure 4.30 Fluorescent Lamp 4. Stick the outside tape and install the cover shield. 1) Stick the tape shield and adhesive tape to fix the top case. NOTE: Be careful not to apply excessive force to the top case. 2) Install the cover shield (C).
4.30 Fluorescent Lamp 4 Replacement Procedure NOTE: Be careful not to apply excessive force to the B/L wire. Cover shield (C) T ape sh ield A dhesive tape Cover shield (G) A dhesi ve ta pe Figure 4-57 Replacing LG.
4 Replacement Procedure 4.30 Fluorescent Lamp 4.30.2 Replacing the 15.0-inch XGA Samsung Fluorescent Lamp Disassembling the 15.0-inch XGA Samsung Fluorescent Lamp To disassemble the 15.0-inch XGA Samsung fluorescent lam p, follow the steps below and refer to figures4-58 to 4-65.
4.30 Fluorescent Lamp 4 Replacement Procedure 2. Remove the two screws. Screw Screw Figure 4-59 Replacing Samsung fluorescent lamp (XGA) (2) Satellite A20 Maintenance Manual (960-444) 4-95.
4 Replacement Procedure 4.30 Fluorescent Lamp 3. Remove the four screws from the top chassis. Screw Screw Screw Screw Figure 4-60 Replacing Samsung fluorescent lamp (XGA) (3) 4-96 Satellite A20 Main t.
4.30 Fluorescent Lamp 4 Replacement Procedure 4. Remove the four bottom hooks and four side hooks (left and right). Then remove the top chassis from the mold fram e.
4 Replacement Procedure 4.30 Fluorescent Lamp 5. Remove the panel assembly from the mold fram e. NOTE: When removing the panel assembly, be careful not to damage the COF.
4.30 Fluorescent Lamp 4 Replacement Procedure 6. Remove the sheets and clips. 1) Remove the two clips fixing the sheets. 2) Remove the sheets (protection sheet, prism sheet (L, U), diffusion sheet, LGP and reflection sheet).
4 Replacement Procedure 4.30 Fluorescent Lamp 7. Remove the lamp back cover. 1) Remove the two screws from the lamp back cover. 2) Remove the lamp back cover.
4.30 Fluorescent Lamp 4 Replacement Procedure 8. Remove the lamp wire from the wire guide of the mold fram e. Lamp wire Figure 4-65 Replacing Samsung fluorescent lamp (XGA) (8) Satellite A20 Maintenan.
4 Replacement Procedure 4.30 Fluorescent Lamp 9. Remove the lamp assembly from the m old frame. Lamp assembly Mold frame Figure 4-66 Replacing Samsung fluorescent lamp (XGA) (9) 4-102 Satellite A20 Ma.
4.30 Fluorescent Lamp 4 Replacement Procedure Satellite A20 Maintenance Manual (960-444) 4-103 Assembling the 15.0-inch XG A Samsumg Fluorescent Lamp The assembly procedure of the 15.0-inch XGA Samsung fluorescent lam p is the reverse of the above disassembly procedure.
4 Replacement Procedures 4.30 Fluorescent Lamp 4 4.30.3 Replacing the 15.0-inch XGA Sharp Fluorescent Lamp Disassembling the 15.0-inch XGA Sharp Fluorescent Lamp To disassemble the 15.0-inch XGA Sharp fluorescent lamp, follow the steps below and refer to figures4-67 to 4-76.
4.30 Fluorescent Lamp 4 Replacement Procedures 2. Remove the four screws on the sides. Screw loosening torque: 1.2kg • cm Screw Screw Screw Screw Figure 4-68 Replacing Sharp fluorescent lamp (XGA) (.
4 Replacement Procedures 4.30 Fluorescent Lamp 3. Turn the LCD module face up and remove the bezel (E). (E) Bezel (1) Rele ase the beze l from the four latches of t he lamp cover . (2) Release the t wo latches (left and right) on the P-chassis. (3) Releas e the hook of the bezel from the l amp cover .
4.30 Fluorescent Lamp 4 Replacement Procedures 4. Turn the LCD module face down and remove the two screws fixing the board. Then open the bent portion of the TCP of the board and remove the backlight.
4 Replacement Procedures 4.30 Fluorescent Lamp Do not hold the edg e. Do not hold th e edge. Raise t he board a nd make this co ndition. Figure 4-71 Replacing Sharp fluorescent lamp (XGA) (5) 4-108 Sa.
4.30 Fluorescent Lamp 4 Replacement Procedures 5. Turn the LCD module face up and remove the LCD panel (I) from the backlight unit (H). CAUTION: Wear finger sacks or gloves during the work not to soil or scratch the LCD panel or backlight unit.
4 Replacement Procedures 4.30 Fluorescent Lamp 6. Turn the backlight unit (H) removed face down and remove the two screws (D) and lamp cover (J). NOTE: Be careful not to scratch or soil the sheets.
4.30 Fluorescent Lamp 4 Replacement Procedures 7. Turn the backlight unit face up and remove the upper diffusion sheet (K), lens sheet (L) and light guide (M). NOTE: Be careful not to scratch or soil the removed sheets or light guide to reuse them. Do not remove the reflecti on sheet under the light guide.
4 Replacement Procedures 4.30 Fluorescent Lamp 8. Remove the four double-sided tapes (N, O, P, Q). NOTE: Discard the removed tapes. Do not reuse them. (P) Doubl e-sided tape 3 (Q) Doubl e-sided tape 4.
4.30 Fluorescent Lamp 4 Replacement Procedures 9. Turn the backlight unit face down and remove the lamp unit (R) from the P-chassis. CAUTION: When removing the lamp unit, be careful not to break the lamp, or bend the reflection sheet.
4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch XGA Sharp Fluorescent Lamp To assemble the 15.0-inch Sharp XGA fluorescent lamp, follow the steps below and refer to figures 4-77 to 4-89. 1. Stick the four double-sided tapes (N, O, P, Q) on the P-chassis.
4.30 Fluorescent Lamp 4 Replacement Procedures 2. Turn the backlight unit face down and install a new lamp unit (R) on the P-chassis. NOTE: When install the lamp unit (R), be careful not to bend or damage the reflection sheet.
4 Replacement Procedures 4.30 Fluorescent Lamp Z Z Cross-section drawing of Z-Z Install the le ad wire into thi s groove. Install the refl ection sheet a s it is placed inside the reflector .
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Install the lamp cover (J) on the backlight unit and secure it with the two screws (D). (J) Lamp cover (D) Screw (D) Screw Screw tightening torque: 1.
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Install the light guide (M) on the backlight unit. Insert the light guide straight not to deform the reflector .
4.30 Fluorescent Lamp 4 Replacement Procedures 5. Place the lens sheet (L) and upper diffusion sheet (K) on the backlight unit with light guide. (K) Upper diffusi on sheet (L) Lens sheet (M) Light g uide Make sure there is no dust or scratch. Do not make any s heet over the edge of P-cha ssi s.
4 Replacement Procedures 4.30 Fluorescent Lamp 6. Place the LCD panel (I) on the backlight unit (H). NOTE: Make sure there is no dust between the LCD panel and backlight unit. If any dust is found, remove it with crepe tape or others which has no remaining of paste.
4.30 Fluorescent Lamp 4 Replacement Procedures 7. Bend the TCP attaching to the source board and secure it with the two screws. Do not hold th e ed g e.
4 Replacement Procedures 4.30 Fluorescent Lamp Screw Screw Figure 4-85 Replacing Sharp fluorescent lamp (XGA) (19) 4-122 Satellite A20 Main tenance Manual (960-444).
4.30 Fluorescent Lamp 4 Replacement Procedures 8. Install the bezel (E) on the lamp cover and hook the four latches on the lamp cover and two latches on the P-chassis. (E) Bezel (2) Lean t he bezel on t he lamp cover without interfe rence with the TCP .
4 Replacement Procedures 4.30 Fluorescent Lamp Make sure of mating of the bezel a nd the r ib of the P-ch assis. Make sure of mating of the bezel an d the l atch o f the P-chas sis.
4.30 Fluorescent Lamp 4 Replacement Procedures 9. Secure the sides of the unit with the four screws. Screw Screw Screw Screw Figure 4-88 Replacing Sharp fluorescent lamp (XGA) (22) Satellite A20 Maint.
4 Replacement Procedures 4.30 Fluorescent Lamp 10. Stick the protection cover G (B), protecti on cover S (A), fixing tape (C) and fixing tape for lead wire (C). Fit the cover according to the outl ine of the screw . Stick th e tap e acco rding to the outlin e of the LCD module.
4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.4 Replacing the 15.0-inch XGA CHIMEI Fluorescent Lamp Disassembling the 15.0-inch XGA CHIMEI Fluorescent Lamp To disassemble the 15.0-inch XGA CHIMEI fluorescent lamp, follow the steps below and refer to figures4-90 to 4-95.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the two screws (B) fixing the X-PCB. Then remove the eight screws (C) fixing the metal frame. Release the two hooks (A).
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Release the latch. NOTE: Remove the metal frame parallel no to damage it. Latch Back light Metal fra me Figure 4-92 Replacing CHIMEI fluorescent lamp .
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the X-PCB. NOTE: When removing the X-PCB, be careful not to damage the TCP. X-PCB Panel Back light un it Figure 4-93 Replacing CHIMEI fluoresce.
4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the three spacers from the BEFIII-M diffuser sheet. Remove the DEFIII-M diffuser sheet, BEFIII-T diffuser sheet and two tapes from the backlight unit in order. NOTE: When removing the sheets, be careful not to damage them.
4 Replacement Procedures 4.30 Fluorescent Lamp 6. Remove the two screws. Screw Screw Lamp assembly Housing Figure 4-95 Replacing CHIMEI fluorescent lamp (XGA) (6) 4-132 Satellite A20 Main tenance Manu.
4.30 Fluorescent Lamp 4 Replacement Procedures Satellite A20 Maintenance Manual (960-444) 4-133 Assembling the 15.0-inch XGA CHIMEI fluorescent lamp To assemble procedure of the 15.0-inch XGA CHIMEI fluorescent lamp, follow the reverse steps of the disassembling steps above.
4 Replacement Procedures 4.30 Fluorescent Lamp 4 4.30.5 Replacing the 15.0-inch SXG A+ LG.Philips Fluorescent Lamp CAUTION : When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.
4.30 Fluorescent Lamp 4 Replacement Procedures Cove r sh ield ( C) T ape sh ield A dhesive ta pe Cover shield (G) A dhesive tap e Figure 4-96 Replacing LG.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the top case. Be careful not to apply excessive force to the top case or gate TCP. To p c a s e Figure 4-97 Replacing LG.
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Remove the source PCB and gate PCB. 1) Remove the source PCB. Be careful not to apply excessive force to the PCB or TCP when removing double-sided tape. 2) Remove the gate PCB. Be careful not to apply excessive force to the PCB or TCP when removing double-sided tape.
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the board assembly, adhesive tape, light guide and cover assem bly bottom (L). 1) Remove the board assembly. NOTE: This process should be made in a clean room to prevent scratch or particle on polarizer or B/L assembly.
4.30 Fluorescent Lamp 4 Replacement Procedures Board assembly A dhesive ta pe Sheets and li ght guide Double-sid ed tape A dhesive t ape Double-sid ed tape A dhesive ta pe A dhesive t ape Screw Cover assembly bottom (L) Screw Figure 4-99 Replacing LG.
4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch SXGA+ LG.Philips Fluorescent Lamp To assembling the 15.0-inch SXGA+ LG.Philips fluorescent lamp, follow the steps below and refer to figures 4-100 to 4-103. 1. Install the cover assembly bottom (L), sheets, light guide, adhesive tape and board assembly.
4.30 Fluorescent Lamp 4 Replacement Procedures Board assembly A dhesive tape Sheets and light guide Double-s ided tape A dhesive tape Double-sided tape A dhesive tap e A dhesive tape Screw Cover assembly bottom (L) Screw Double-sided tape Double-sided tape Figure 4-100 Replacing LG.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Install the source PCB and gate PCB. 1) Install the source PCB. Be careful not to apply excessive force to the TCP. 2) Install the gate PCB. Be careful not to apply excessive force to the TCP. Source PCB Gate PCB Figure 4-101 Replacing LG.
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Install the top case. Be careful not to apply excessive force to the gate TCP. To p c a s e Figure 4-102 Replacing LG.
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Stick the out side tape and cover shield. 1) Install the tape shield and adhesive tape to fix the top case. Be careful not to apply excessive force to the top case. 2) Install the cover shield (C). Be careful not to apply excessive force to the control PCB.
4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.6 Replacing the 15.0-inch SXGA+ Samsung Fluorescent Lamp Disassembling the 15.0-inch SXGA+ Samsung Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the two screws securing the PCB. Screw Screw Figure 4-105 Replacing Samsung fluorescent lamp (SXGA+) (2) 4-146 Satellite A20 Main tenance Manua.
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Remove the four screws from the top side of the chassis. Screw Screw Screw Screw Figure 4-106 Replacing Samsung fluorescent lamp (SXGA+) (3) Satellite.
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the four bottom hooks and five hooks (left and right). Then remove the top chassis from the mold fram e. CAUTION: When you release hooks on the top chassis, be careful not to apply excessive force to the FL.
4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the panel assembly from the mold fram e. Panel ass embly Mold frame Figure 4-108 Replacing Samsung fluorescent lamp (SXGA+) (5) Satellite A20 M.
4 Replacement Procedures 4.30 Fluorescent Lamp 6. Remove the two clips. Then remove the five sheets (prism sheet (L, U), diffusion sheet, LGP and reflection sheet).
4.30 Fluorescent Lamp 4 Replacement Procedures 7. Remove the two screws securing the lamp back cover. Then remove the lamp back cover. Lamp back co ver Screw Screw Figure 4-110 Replacing Samsung fluor.
4 Replacement Procedures 4.30 Fluorescent Lamp 8. Remove the lamp wire from the wire guide of the mold fram e. Lamp wire Figure 4-111 Replacing Samsung fluorescent lamp (SXGA+) (8) 4-152 Satellite A20.
4.30 Fluorescent Lamp 4 Replacement Procedures 9. Remove the lamp assem bly from the mold fram e. Lamp assembly Mold frame Figure 4-112 Replacing Samsung fluorescent lamp (SXGA+) (9) Satellite A20 Mai.
4 Replacement Procedures 4.30 Fluorescent Lamp 4-154 Satellite A20 Main tenance Manual (960-444) Assembling the 15.0-inch SXGA+Samsung Fluorescent Lamp The assembly procedure is the reverse of the above disassembly procedure.
4.30 Fluorescent Lamp 4 Replacement Procedures 4 4.30.7 Replacing the 15.0-inch SXGA+ Sharp Fluorescent Lamp To disassemble the 15.0-inch SXGA+ Sharp fluorescent lamp, follow the steps below and refer to Figures 4-113 to 4-122.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the four screws on the sides. Screw loosening torque: 1.1kg • cm Screw Screw Screw Screw Figure 4-114 Replacing Sharp fluorescent lamp (SXGA+.
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Turn the LCD module face up and remove the bezel (E). (E) Bezel (1) Rel ease the bezel from the four lat ches of the lamp c over . (2) Relea se the t wo latches on the P- chassi s. (3) Relea se th e hook of the beze l fr om th e lamp cov er .
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Turn the LCD module face down. Remove the four screws fixing the board and remove the FPC (G). Open the bent portion of the TCP of the board and remove the backlight. Screw Screw Screw Screw (G) FPC Screw looseni ng torq ue: 0.
4.30 Fluorescent Lamp 4 Replacement Procedures Do not hold th e edge. Do not hold th e edge. Raise t he board an d make this co ndit ion. Figure 4-117 Replacing Sharp fluorescent lamp (SXGA+) (5) Sate.
4 Replacement Procedures 4.30 Fluorescent Lamp 5. Turn the LCD module face up and remove the LCD panel (I) from the backlight unit (H). NOTE: Wear finger sacks or gloves during the work not to soil or scratch the LCD panel or backlight unit.
4.30 Fluorescent Lamp 4 Replacement Procedures 6. Turn the backlight unit (H) removed face down and remove the two screws (D) and lamp cover (J). NOTE: Be careful not to scratch or soil the sheets.
4 Replacement Procedures 4.30 Fluorescent Lamp 7. Turn the backlight unit face up and remove the upper diffusion sheet (K), lens sheet (L) and light guide (M). NOTE: The light guide and sheets are reused. Be careful not to scratch or soil them. Do not remove the reflection sheet under the light guide.
4.30 Fluorescent Lamp 4 Replacement Procedures 8. Remove the four double-sided tapes (N, O, P, Q). NOTE: Discard the removed tapes. Do not reuse them. (P) Doubl e-sided tape 3 (Q) Doubl e-sided tape 4.
4 Replacement Procedures 4.30 Fluorescent Lamp 9. Turn the backlight unit face down and remove the lamp unit (R) from the P-chassis. CAUTION: When removing the lamp unit, be careful not to break the lamp, or bend the reflection sheet.
4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 15.0-inch SXG A+ Sharp Fluorescent Lamp To assemble the 15.0-inch SXGA+ Sharp fluorescent lamp, follow the steps below and refer to Figures 4-123 to 4-137. 1. Stick the four double-sided tapes (N, O, P, Q) on the P-chassis.
4 Replacement Procedures 4.30 Fluorescent Lamp 2. Turn the backlight unit face down and install a new lamp unit (R) on the P-chassis. P-chassis (R) Lamp unit Figure 4-124 Replacing Sharp fluorescent l.
4.30 Fluorescent Lamp 4 Replacement Procedures NOTE: When install the lamp unit, be careful not to bend or damage the reflection sheet. Z Z Install the lamp unit without floating. Install the reflection sheet as it is placed inside the reflector. Install the lead wire into this groove.
4 Replacement Procedures 4.30 Fluorescent Lamp 3. Install the lamp cover (J) on the backlight unit and secure it with the two screws. (J) Lamp cov er (D) Screw (D) Screw Screw tightening torque: 0.
4.30 Fluorescent Lamp 4 Replacement Procedures 4. Install the light guide (M) on the backlight unit. Insert the l ight guide straight not to deform the reflector .
4 Replacement Procedures 4.30 Fluorescent Lamp 5. Place the lens sheet (L) and upper diffusion sheet (K) on the backlight unit with light guide. (K) Upper diffusi on sheet (L) Lens sheet (M) Light g uide Make sure there is no dust or scratch.
4.30 Fluorescent Lamp 4 Replacement Procedures 6. Place the LCD panel (I) on the backlight unit (H). NOTE: Make sure there is no dust between the LCD panel and backlight unit. If any dust is found, remove it with crepe tape or others which has no remaining of paste.
4 Replacement Procedures 4.30 Fluorescent Lamp 7. Bend the TCP attaching to the source board and secure it with the two screws. Then bend the TCP attaching to the gate board with the two screws and insert the FPC (G) into the connector of the source board.
4.30 Fluorescent Lamp 4 Replacement Procedures Screw Screw Screw (G) Fit the pin and the ho le. Screw Fit the pin and t he hole . Do n ot co ver t he projection . Fit the pin and t he hole. Fo ld th e gate boa rd. Screw tightening to rque: 0.9kg • cm Fold the source board .
4 Replacement Procedures 4.30 Fluorescent Lamp 8. Install the bezel (E) on the lamp cover. Attach the four latches on the lamp cover and two latches on the P-chassis. (E) Bezel (2) Lean t he bezel on the l amp cover without int erference with the TCP .
4.30 Fluorescent Lamp 4 Replacement Procedures Make sure of mating of the b ezel and the rib of the P-ch assis. Make sure of mat ing of the bezel a nd the latch o f the P-chas sis.
4 Replacement Procedures 4.30 Fluorescent Lamp 9. Secure the sides of the unit with the four screws. Screw Screw Scre w Screw Figure 4-134 Replacing Sharp fluorescent lamp (SXGA+) (22) 4-176 Satellite.
4.30 Fluorescent Lamp 4 Replacement Procedures 10. Stick the protection cover G (B). (B) Protecti on cover G Outline standard for the gate board Figure 4-135 Replacing Sharp fluorescent lamp (SXGA+) (.
4 Replacement Procedures 4.30 Fluorescent Lamp 11. Stick the protection cover S (A), fixing tape (C), fixing tape for lead wire (D). Fit the cover according to the outline of the screw . Stick the tape ac cording to the outli ne of the module. Make su re the tape does not appea r on the si de of the module .
4.30 Fluorescent Lamp 4 Replacement Procedures Satellite A20 Maintenan ce Manual (960-444) 4-179 0 to 1 mm 0 to 1 mm Standard for the outline of screw (left and right) Standard for the outline of boar d Make sure the edge of plasti c resin is between ± 0.
4 Replacement Procedures 4.30 Fluorescent Lamp 4 4.30.8 Replacing the 14.1-inch XGA TOSHIBA Fluorescent Lamp CAUTION : When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.
4.30 Fluorescent Lamp 4 Replacement Procedures Removing the screws 1. Spread out the insulation sheet without detaching it from the side of the bezel, as shown in Figure 4-139. 2. In the order (1) and (2) shown in Figure 4-139, remove the screws from the left- and right-hand sides of the module.
4 Replacement Procedures 4.30 Fluorescent Lamp Removing the bezel 1. Without removing the insulation tape, flip the m odule over again so that the display screen can face up. 2. Release the latches of the bezel and frame. (On the sides, there are five latches in the upper area and two latches in the lower area.
4.30 Fluorescent Lamp 4 Replacement Procedures Opening the PCB 1. Spread out the PCB horizontally, as shown in Figure 4-141. CAUTION: Use care not to damage the TAB. ‚w‚o‚b‚a‚ð— –Ê‚© ‚çŠJ‚-D 1 Open the X-PCB from the reverse si de.
4 Replacement Procedures 4.30 Fluorescent Lamp Removing the PCB-assembly cell 1. Remove the cell of the PCB assembly from the backlight assembly, as indicated by (1) in Figure 4-142. Completely remove the double-sided tape rem aining on the reverse side of the cell.
4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA TOSHIBA Fluorescent Lamp To assembling the 14.1-inch XGA TOSHIBA fluorescent lamp, follow the steps below and refer to figures 4-143 to 4-149. Putting the double-sided tapes on the bezel 1.
4 Replacement Procedures 4.30 Fluorescent Lamp Checking the backlight 1. Inspect the replacement backlight according to Figure 4-144. æ ‚èã ‚˚‚Ä‚¢‚È‚¢ ‚±‚ÆB ƒtƒŒ[ ƒ ‚É.
4.30 Fluorescent Lamp 4 Replacement Procedures Assembling PCB-assembly cell 1. Remove the paper (coated with a mold release) from the double-sided tape in the three areas on the replacement backlight unit. The areas are at the top and on both sides. See Figure 4-145.
4 Replacement Procedures 4.30 Fluorescent Lamp Folding down and temporary fixing of the TAB/PCB 1. Fold down the TAB (PCB) toward the reverse side of the backlight unit, as shown in Figure 4-146. CAUTION: Use care not to damage the TAB. 1 ‚w‚o‚b‚a‚ð— –Ê‚ÉÜ ‚è‹È‚˚D For the X-PCB toward the reverse side.
4.30 Fluorescent Lamp 4 Replacement Procedures Setting the bezel 1. Start installing the bezel in the upward direction until it stops at the top left corner. NOTE: The GND-CU and lamp reflector on the left-hand side must not go beyond the edges of the bezel.
4 Replacement Procedures 4.30 Fluorescent Lamp Fasten screws of the PCB and bezel 1. Fasten the four screws on the left edge in the order (5), (6), (7), and (8) shown in Figure 4-148. 2. Fasten the four screws on the right edge in the order (1), (2), (3), and (4) shown in Figure 4-148.
4.30 Fluorescent Lamp 4 Replacement Procedures Attaching the tapes and insulation sheet 1. Attach the PCB insulation sheet (one location). 2. Attach the tape for the bezel to the bottom area close to the lamp (two locations). 3. Attach the tape for fixing the FL tube cable (one location).
4 Replacement Procedures 4.30 Fluorescent Lamp 4.30.9 Replacing the 14.1-inch XGA Sharp Fluorescent Lamp Disassembling the 14.1-inch XGA Sharp Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module.
4.30 Fluorescent Lamp 4 Replacement Procedures 2. Remove the screws (E) on both sides. The maximu m all owed rel easi ng to rque is 0.10 78N ¥ m (1 . 1k gf ¥ cm). Figure 4-151 Removing the screws from the sides 3. Flip the module over again (with the top of the module facing up) and remove the two latches that are close to the lamp.
4 Replacement Procedures 4.30 Fluorescent Lamp 4. Using the U-shaped edge of the bezel as a "hinge," raise the edge of the bezel from which the latches have been removed. Then remove the bezel. Peel off the tape for GND wire fixing (J). U-shaped edge of the bezel Tape for grou nd wire fi xi ng ( J) Figure 4-153 Removing the bezel 5.
4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA Sharp Fluorescent Lamp To assembling the 14.1-inch XGA Sharp fluorescent lamp, follow the steps below and refer to figures 4-155 to 4-159. 1. Attach the lamp cover (F) and attach the shield tape to the lamp cover after f olding it.
4 Replacement Procedures 4.30 Fluorescent Lamp 3. Fasten the five screws (E) on both sides. Make sure that the two latches are fitting surely. Maxi m u m all owed ti gh t eni ng t or que is 0.
4.30 Fluorescent Lamp 4 Replacement Procedures 4. Attach the protection cover S (A), protection cover G (B), aluminum tape (C), tape for lead fixing (D), and aluminum shield (K). All of which m ust be new ones. Attach the protection cover (A) then cover (B), using the engaging pins as the guide.
4 Replacement Procedures 4.30 Fluorescent Lamp 4-198 Satellite A20 Main tenance Manual (960-444) 5. Upon completion of the assembly, perform visual inspections, as shown in Figure 4- 159.
4.30 Fluorescent Lamp 4 Replacement Procedures 4 4.30.10 Replacing the 14.1-inch XGA Samsung Fluorescent Lamp CAUTION : When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.
4 Replacement Procedures 4.31 Addendum 2. Remove the two screws for fixing the power supply board. CAUTION: Use care not to damage the PCB. 1 2 Screw Scre w Figure 4-161 Removing the two screws for fi.
4.30 Fluorescent Lamp 4 Replacement Procedures 3. Release the 18 hooks and remove the upper chassis from the frame. There are six hooks at the top, four hooks on each of the left- and right-hand sides, and four hooks at the bottom.
4 Replacement Procedures 4.31 Addendum 4. Remove the panel assembly from the backlight assembly. CAUTION: Use care not to damage the TCP during working.
4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the two clips. 6. Remove these: • Prism sheet • Diffuser sheet • Light guide plate (LGP) • Reflective sheet Remov e the clip Remov e th.
4 Replacement Procedures 4.31 Addendum 7. Remove the two screws for fixing the back cover of the FL tube. Screws Figure 4-165 Removing the screws for fixing the FL tube back cover 4-204 Satellite A20 .
4.30 Fluorescent Lamp 4 Replacement Procedures 8. Disconnect the ground wire of the FL tube from the frame. F rame GND wire Hot wire Figure 4-166 Disconnecting the FL tube ground wire Satellite A20 Ma.
4 Replacement Procedures 4.31 Addendum 9. Remove the FL tube from the frame. FL Figure 4-167 Removing the FL tube 4-206 Satellite A20 Main tenance Manual (960-444).
4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA Samsung Fluorescent Lamp To assembling the 14.1-inch XGA Samsung fluorescent lam p, follow the steps below and refer to figures 4-160 to 4-167. 1. Place the FL tube on the correct location in the frame.
4 Replacement Procedures 4.31 Addendum 4.30.11 Replacing the 14.1-inch XGA L.G. Philips Fluorescent Lamp Disassembling the 14.1-inch XG A L.G. Philips Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module.
4.30 Fluorescent Lamp 4 Replacement Procedures T ape Adhesiv e:7250L-0026U Cov er Shield (C):3550L-0281A Cov er Shield (G):7250L-0154B T ape Adhesiv e:7250L-0026N T ape Adhesiv e:7250L-0026K Figure 4-.
4 Replacement Procedures 4.31 Addendum Removing the control PCB, top case and cover assembly 6. Remove the FPC cable (1) used for the control PCB connecting. CAUTION : Pressure or stress should not be given on the FPC cable. 7. Remove the control PCB (2).
4.30 Fluorescent Lamp 4 Replacement Procedures Removing the source PCB and gate PCB 10. Remove the source PCB (1). CAUTION : Pressure or stress should not be given on the PCB and TCP during removing double tape. 11. Remove the gate PCB (2). CAUTION : Pressure or stress should not be given on the PCB and TCP during removing double tape.
4 Replacement Procedures 4.31 Addendum Removing the board assembly, tape pad sheet, light guide, cover bottom and lamp assembly 12. Remove the board assembly (1). CAUTION : This process should be made in the clean room with no scratch nor particle on the Polarize and B/L assembly .
4.30 Fluorescent Lamp 4 Replacement Procedures Board Assembly:6060L-C017 Sheets & LGP Screw Scre w Double T ape:7250L-0025E T ape P ad Figure 4-171 Removing the board assembly, tape pad sheet, lig.
4 Replacement Procedures 4.31 Addendum Assembling the 14.1-inch XG A L.G. Philips Fluorescent Lamp To assembling the 14.1-inch XGA L.G. Philips fluorescent lamp, follow the steps below and refer to figures 4-172 to 4-175. Attaching the double tape, lamp assembly, cover bottom, sheets, light guide, tape adhesive and board assembly 1.
4.30 Fluorescent Lamp 4 Replacement Procedures Board Assembly:6060L-C017 Sheets and LGP Kapton T ape: 7250L-0026Q Screw Scre w Double T ape:7250L-0025E T ape P ad Figure 4-172 Attaching the double tap.
4 Replacement Procedures 4.31 Addendum Attaching the source PCB and gate PCB 9. Attach the source PCB (1). CAUTION : Stress should not be given on the TCP.
4.30 Fluorescent Lamp 4 Replacement Procedures Attaching the cover bottom, screw, top case, control PCB and FPC 11. Attach the bottom cover and screw (1). CAUTION : Pressure should not be given on the source TCP. 12. Attach the top case (2). CAUTION : Pressure should not be given on the gate TCP.
4 Replacement Procedures 4.31 Addendum Attaching the outside tape and cover shield 15. Attach the tape adhesive (1) used for B/L wire fixing. CAUTION : Pressure or stress should not be given on the B/L wire fixing. 16. Attach the tape adhesive (2) used for top case fixing.
4.30 Fluorescent Lamp 4 Replacement Procedures T ape Adhesiv e:7250L-0026U Cov er Shield (C):3550L-0281A Cov er Shield (G):7250L-0154B T ape Adhesiv e:7250L-0026K T ape Adhesiv e:7250L-0026N T ape Adh.
4 Replacement Procedures 4.31 Addendum 4-220 Satellite A20 Main tenance Manual (960-444) 4.31 Addendum Appropriate Setting of the “SLIDE SWITCH” for the CPUs When installing a CPU, make sure that the “SLIDE SW ITCH” (S1060) is set correctly according to the type of CPU used.
Appendices.
Appendices App-ii Satellite A20 Maintenance Manual (960-444).
Appendices Appendix Contents Appendix A Handling the LCD Module .......................................................................... A-1 Appendix B Board Layout ....................................................................................
Appendices C.19 PJ3003 Speaker (Left) Connector (2-pin) ...........................................................C-17 C.20 PJ4000 USB 0 Connector (4-pin)........................................................................C-17 C.21 PJ4001 USB 1 Connector (4-pin).
Appendices Appendix D Keyboard Scan/Character Codes................................................................ D-1 Appendix E Key Layout .....................................................................................................E-1 E.1 United States (US) Keyboard .
Appendices Figures Figure B-1 System board layout (front) ...............................................................................1 Figure B-2 System board layout (back) ..........................................................................
Appendices Tables Table B-1 System board ICs and connectors (front) ..........................................................2 Table B-2 System board ICs and connectors (back) ...........................................................5 Table B-3 Sound board ICs and connectors (front) .
Appendices App-viii Satellite A20 Maintenance Manual (960-444) Table C-24 Mini PCI Card interface conn ector pin assignments (124-pin) ...................C-19 Table C-25 Network interface connector pin assignments (8-pin) .............................
Appendix A Handling the LCD Module Appendices Appendix A Appendix A Handling the LCD Module Precautions for handling the LCD module The LCD module can be easily damaged during assem bly or disassembly. Observe the following precautions when handling the LCD module: 1.
Appendices Appendix A Handling the LCD module 3. If the panel’s surface gets dirty, wipe it with cotton or a soft cloth. If it is still dirty, try breathing on the surface to create a light condensate and wipe it again. If the surface is very dirty, we recommend a CRT cleaning agent.
Appendix A Handling the LCD Module Appendices 5. Glass is used in the panel, so be careful not to drop it or let it strike a hard object, which could cause breakage or cracks. 6. CMOS-LSI circuits are used in the module, so guard against damage from electrostatic discharge.
Appendices Appendix A Handling the LCD module 7. Do not expose the module to direct sunlight or strong ultraviolet rays for long periods. 8. Do not store the module at temperatures below specifications. Cold can cause the liquid crystals to freeze, lose their elasticity or otherwise suffer damage.
Appendix A Handling the LCD Module Appendices 9. Do not disassemble the LCD module. Disassembly can cause m alfunctions. 10. If you transport the module, do not use packing material that contains epoxy resin (amine) or silicon glue (alcohol or oxime).
Appendices Appendix A Handling the LCD module A-6 Satellite A20 Maintenance Manual (960-444).
Appendix B Board Layout Appendices Appendix B Board Layout B.1 System Board Front View Figure B-1 System board layout (front) Satellite A20 Maintenance Manual (960-444) B-1.
Appendices Appendix B Board Layout Table B-1 System board layout (front) Mark Number Name (A) IC2100 PC Card Power Switch MIC2563A (B) IC5640 TV encoder TVxpress2 (C) IC8972 PSC TMP87PM48V (D) PJ1400 .
Appendix B Board Layout Appendices B.2 System Board Back View Figure B-2 System board layout (back) Satellite A20 Maintenance Manual (960-444) B-3.
Appendices Appendix B Board Layout Table B-2 System board layout (back) Mark Number Name (A) IC1000 Clock Generator ICS951104 (B) IS1050 CPU Socket (C) IC1150 Thermal Sensor ADM1032AR (D) IC1200 North.
Appendix B Board Layout Appendices B.3 Sound Board Front View Figure B-3 Sound board layout (front) Table B-3 Sound board layout (front) Mark Number Name (A) IC6000 Sound CODEC AD1981B (B) X6000 24.
Appendices Appendix B Board Layout B.4 Sound Board Back View Figure B-4 Sound board layout (back) B-6 Satellite A20 Maintenance Manual (960-444).
Appendix B Board Layout Appendices Table B-4 Sound board layout (back) Mark Number Name (A) PJ2130 SD Card Slot (B) PJ3010 MDC I/F connector (C) PJ6000 External Microphone jack (D) PJ6001 Line In jack.
Appendices Appendix B Board Layout B-8 Satellite A20 Maintenance Manual (960-444) B.5 USB Board Front and Back View Figure B-5 USB board layout (front/back) Table B-5 USB board ICs and connectors (fro.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-1 Appendix C Appendix C Pin Assignments System Board FSNAM* C.1 PJ1400 Memory 1 Connector (200-pin) Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (1/3) Pin No.
Appendices Apx.C Pin Assignments C-2 Satellite A20 Maintenance Manual (960-444) Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (2/3) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-3 Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (3/3) Pin No.
Appendices Apx.C Pin Assignments C-4 Satellite A20 Maintenance Manual (960-444) C.2 PJ1401 Memory 2 Connector (200-pin) Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (1/3) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-5 Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (2/3) Pin No.
Appendices Apx.C Pin Assignments C-6 Satellite A20 Maintenance Manual (960-444) Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (3/3) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-7 C.3 PJ1800 HDD Interface Connector (44-pin) Table C-3 HDD interface connector pin assignments (44-pin) Pin No.
Appendices Apx.C Pin Assignments C-8 Satellite A20 Maintenance Manual (960-444) C.4 PJ1820 ODD Interface Connector (50-pin) Table C-4 ODD interface connector pin assignments (50-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-9 C.6 PJ2110 PC Card Interface Connector (68-pin) Table C-6 PC-Card interface connector pin assignments (68-pin) Pin No.
Appendices Apx.C Pin Assignments C-10 Satellite A20 Maintenance Manual (960-444) C.7 PJ2200 Mini PCI Card Interface Connector (124-pin) Table C-7 Mini PCI card interface connector pin assignments (124-pin) (1/2) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-11 Table C-7 Mini PCI interface connector pin assignments (124-pin) (2/2) Pin No.
Appendices Apx.C Pin Assignments C-12 Satellite A20 Maintenance Manual (960-444) C.8 PJ4900 Bluetooth Interface Connector (20-pin) Table C-8 Bluetooth interface connector pin assignments (20-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-13 C.10 PJ3240 Touch Pad Interface Connector (8-pin) Table C-10 Touch Pad interface connector pin assignments (8-pin) Pin No. Signal name I/O Pin No. Signal name I/O 1 GND - 2 GND - 3 GND - 4 NC - 5 IPDCLK-P5P I/O 6 IPDDAT-P5P I/O 7 P5V - 8 P5V - C.
Appendices Apx.C Pin Assignments C-14 Satellite A20 Maintenance Manual (960-444) C.12 PJ3510 Parallel Interface Connector (25-pin) Table C-12 Parallel interface connector pin assignments (25-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-15 C.14 PJ4600 USB Connector (12-pin) Table C-14 USB connector pin assignments (12-pin) Pin No.
Appendices Apx.C Pin Assignments C-16 Satellite A20 Maintenance Manual (960-444) C.16 PJ5601 LCD 1 Interface Connector (20-pin) Table C-16 LCD 1 interface connector pin assignments (20-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-17 C.19 PJ8770 Fan 0 Interface Connector (3-pin) Table C-19 Fan 0 interface connector pin assignments (3-pin) Pin No. Signal name I/O Pin No. Signal name I/O 1 FANVCC O 2 GND - 3 FANG1-P3P I C.
Appendices Apx.C Pin Assignments C-18 Satellite A20 Maintenance Manual (960-444) C.23 PJ9510 FSNAS* Boar d Interface Connector (18-pin) Table C-23 FSNAS* board interface connector pin assignments (18-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-19 C.24 PJ9511 Sound Board 1 Interface Connector (50-pin) Table C-24 Sound board 1 interface connector pin assignments (50-pin) Pin No.
Appendices Apx.C Pin Assignments C-20 Satellite A20 Maintenance Manual (960-444) C.26 PJ9513 Speaker (Left) Connector (2-pin) Table C-26 Speaker (Left) Connector pin assignments (2-pin) Pin No. Signal name I/O Pin No. Signal name I/O 1 SPKOTL-EXP O 2 SPKOTL-EXN O C.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-21 Sound Board FSNAS* C.29 PJ2130 SD Card Interface Connector (12-pin) Table C-29 SD card interface connector pin assignments (12-pin) Pin No.
Appendices Apx.C Pin Assignments C-22 Satellite A20 Maintenance Manual (960-444) C.31 PJ6000 External Microphone Connector (6-pin) Table C-31 External microphone connector pin assignments (6-pin) Pin No. Signal name I/O Pin No. Signal name I/O 1 A-GND - 2 MICIN-PXP O 3 REFV-P2V - 4 A-GND - 5 NC - 6 A-GND - C.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-23 C.34 PJ9600 System Board 1 Interface Connector (50-pin) Table C-34 System Board 1 interface connector pin assignments (50-pin) Pin No.
Appendices Apx.C Pin Assignments C-24 Satellite A20 Maintenance Manual (960-444) C.35 PJ9601 Sound Board 2 Interface Connector (18-pin) Table C-35 Sound board 2 interface connector pin assignments (18-pin) Pin No.
Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444) C-25 FIR Board FSNAF* C.36 PJ2902 System Board 2 Interface Connector (18-pin) Table C-36 System Board 2 interface connector pin assignments (18-pin) Pin No. Signal name I/O Pin No.
Appendices Apx.C Pin Assignments C-26 Satellite A20 Maintenance Manual (960-444).
Appendix D Keyboard Scan/Character codes Appendices Satellite A20 Maintenance Manual (960-444) D-1 Appendix D Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (1/4) Code set 1 Code set 2 Cap No.
Appendices Appendix D Keyboard Scan/Character Codes D-2 Satellite A20 Maintenance Manual (960-444) Table D-1 Scan codes (set 1 and set 2) (2/4) Code set 1 Code set 2 Cap No.
Appendix D Keyboard Scan/Character Codes Appendices Satellite A20 Maintenance Manual (960-444) D-3 Table D-1 Scan codes (set 1 and set 2) (3/4) Code set 1 Code set 2 Cap No.
Appendices Appendix D Keyboard Scan/Character Codes D-4 Satellite A20 Maintenance Manual (960-444) Table D-1 Scan codes (set 1 and set 2) (4/4) Code set 1 Code set 2 Cap No.
Appendix D Keyboard Scan/Character Codes Appendices Satellite A20 Maintenance Manual (960-444) D-5 Table D-2 Scan codes with left Shift key Code set 1 Code set 2 Cap No.
Appendices Appendix D Keyboard Scan/Character Codes D-6 Satellite A20 Maintenance Manual (960-444) Table D-3 Scan codes in Numlock mode Code set 1 Code set 2 Cap No.
Appendix D Keyboard Scan/Character Codes Appendices Satellite A20 Maintenance Manual (960-444) D-7 Table D-5 Scan codes in overlay mode Code set 1 Code set 2 Cap No.
Appendices Appendix D Keyboard Scan/Character Codes D-8 Satellite A20 Maintenance Manual (960-444) Table D-7 No.126 key scan code Code set 1 Code set 2 Key top Shift Make Make Pause Co mm o n * E1 1D 45 E1 9D C5 E1 14 77 E1 F0 14 F0 77 Ctrl* E0 46 E0 C6 E0 7E E0 F0 7E *: This key generates only make codes.
Appendix E Key Layout Appendices Satellite A20 Maintenance Manual (960-444) E-1 E Appendix E Key Layout E.1 United States (US) Keyboard Figure E-1 US keyboard E.
Appendices Appendix E Key Layout E-2 Satellite A20 Maintenance Manual (960-444) E.3 German (GR) Keyboard Figure E-3 GR keyboard E.4 French (FR) Keyboard Figure E-4 FR keyboard.
Appendix E Key Layout Appendices Satellite A20 Maintenance Manual (960-444) E-3 E.5 Spanish (SP) Keyboard Figure E-5 SP keyboard E.6 Italian (IT) Keyboard Figure E-6 IT keyboard.
Appendices Appendix E Key Layout E-4 Satellite A20 Maintenance Manual (960-444) E.7 Scandinavian (SC) Keyboard Figure E-7 SC keyboard E.8 Swiss-German (SL) Keyboard Figure E-8 SL keyboard.
Appendix E Key Layout Appendices Satellite A20 Maintenance Manual (960-444) E-5 E.9 Canadian (CS) Keyboard Figure E-9 CS keyboard.
Appendices Appendix E Key Layout E-6 Satellite A20 Maintenance Manual (960-444).
Appendix F Wiring Diagrams Appendices Appendix F Appendix F Wiring Diagrams F.1 Parallel Port Wraparound Connector -SELECT Figure F-1 Parallel port wraparound connector F.
Appendices Appendix F Wiring Diagrams F-2 Satellite A20 Maintenance Manual (960-444).
Appendix G BIOS Rewrite Procedures Appendices Appendix G Appendix G BIOS Rewrite Procedures This Appendix explains how to rewrite the system BIOS program when you update the system BIOS. Tools To rewrite the BIOS, you need the following tool: BIOS/EC/KBC rewriting disk for the com puter that has renewed BIOS data.
Appendices Appendix G BIOS Rewrite Procedures G-2 Satellite A20 Maintenance Manual (960-444).
Appendix H EC/KBC Rewrite Procedures Appendices Appendix H Appendix H EC/KBC Rewrite Procedures This Appendix explains how to rewrite the EC/KBC system program when you update the EC/KBC system. Tools To rewrite the EC/KBC, you need the following tool: BIOS/EC/KBC rewriting disk for the computer Rewriting the EC/KBC NOTE: 1.
Appendices Appendix H EC/KBC Rewrite Procedures H-2 Satellite A20 Maintenance Manual (960-444).
Appendix I Reliability Appendices Appendix I Appendix I Reliability The following table shows MTBF (Mean Time Between Failures) for each component. Table I-1 MTBF Component Time (hours) LCD 50,000 Key.
Appendices Appendix I Reliability I-2 Satellite A20 Maintenance Manual (960-444).
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Toshiba satellite a20 series è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Toshiba satellite a20 series - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Toshiba satellite a20 series imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Toshiba satellite a20 series ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Toshiba satellite a20 series, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Toshiba satellite a20 series.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Toshiba satellite a20 series. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Toshiba satellite a20 series insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
