Manuale d’uso / di manutenzione del prodotto 140L del fabbricante IBM
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S37L-5192-00 IBM Mobile Systems ThinkPad i Series 1400 (2611) This Manual Supports The Following Models: 1412, 1419, 1452, 1456, 1459, 1472, 1476, 1479, 140A, 140C, 140F, 140H, 140K, 140L, 140M, 140T,.
Before using this information and the product it supports, be sure to read the general information under “Read This First” on page 1. First Edition (May 1999) The following paragraph does not appl.
Contents ThinkPad i Series 1400 Hardware Maintenance Manual . . . . . . . . . . . . . . . . . . . . . 1 Read This First .................. 1 How to Use Error Messages .......... 1 How to Diagnose Multiple FRUs ........ 1 What to Do First .............
Battery Assembly . . . . . . . . . . . . . . . 36 DIMM and DIMM Cover ............ 3 7 Modem Board Cover and Modem Board .... 3 8 Keyboard . . . . . . . . . . . . . . . . . . . 39 CPU Thermal Plate .............. 4 1 RTC Battery, CPU EMI Shield and Hard Disk Drive 42 PCMCIA Holder .
ThinkPad i Series 1400 Hardware Maintenance Manual Read This First Before you go to the check procedures, be sure to read this section. Important Notes Only certified trained personnel should service the computer. Read the FRU service procedures before replacing any FRUs.
What to Do First The servicer must include the following in the parts exchange form or parts return form that is attached to the returned FRU: 1. Name and phone number of servicer. 2. Date of service. 3. Date when part failed. 4. Date of purchase. 5. Failure symptoms, error codes appearing on display, and beep symptoms.
If the following symptoms are present, they may indicate damage caused by non-warranted activity: Missing parts may be a symptom of unauthorized service or modification. HDD spindles can become noisy if subjected to excessive force or by being dropped.
Power-On and Setup Password To clear a password from the system, first identify the system password switch by referring to “Switch Locations” on page 74, then follow these steps: 1. Turn off the computer. 2. Unplug the AC Adapter and remove the battery.
Check Procedures Use the following procedure as a guide for computer prob- lems. Notes: 1. The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards, or mod- ified options can give false errors and invalid system responses.
Symptoms (Verified) Go to Other symptoms Appropriate check instructions in this section, then use appropriate tables in “Symptom-to-FRU Index” on page 17. Power Systems Check To verify the symptom of the problem, power on the com- puter using each of the power sources as follows: 1.
If the measured voltage is correct, replace the planar board. If the problems still persist, go to “Undetermined Problems” on page 25. If the voltage is not correct, go to the next step.
Note: Signal lines, not used in these steps, are used for communication between the system and the battery. 3. If the voltage is less than +8 V dc, recharge the battery pack. If the voltage is still less than +8 V dc after recharging, replace the battery.
CAUTION: This system cannot work without DIMM memory. Memory errors might stop system operation, show error messages on the screen, or hang the system. Use the following procedure to isolate memory problems: Note: Make sure that the DIMM is properly installed into the connector.
Replace the planar board. The following external input devices are supported for this computer: Numeric keypad Mouse (PS/2 compatible) Keyboard If any of these devices do not work, reconnect the cable connector and repeat the failing operation.
If either the pointing stick or the click button does not work, do the following actions one a time to correct the problem. Do not replace a non-defective FRU. 1. Reconnect the keyboard flexible cables and the TrackPoint flexible cable. 2. Replace the TrackPoint board.
If an error occurs, reconnect the connector on the planar board. If the error still remains: 1. Reconnect the CD-ROM/DVD-ROM drive cable. 2. Replace the CD-ROM/DVD-ROM drive cable. 3. Replace the CD-ROM/DVD-ROM drive. 4. Replace the planar board. Modem Board Check Do the following to isolate the problem to the system internal modem: 1.
BIOS Utility Your computer has a BIOS Utility that allows you to con- figure the computer an its hardware settings. Note: The computer is also bundled with a Windows- based computer management utility similar in func- tion with the BIOS Utility called the Notebook manager.
Navigating the BIOS Utility Keep in mind the following when using the BIOS Utility: From the main menu screen, press the up or down arrow keys to move from one menu item to another; then press Enter to enter the selected menu. Parameters displayed in low brightness (grayed out) are not user-configurable.
Power Management Features Two power management modes are available in the com- puter system to reduce power consumption and to prolong battery life. Screen Blanking Mode When in screen blanking mode, the following occurs: The LCD backlight turns off.
Note: If the computer enters standby mode and the com- puter is using a communication or I/O PC Card, the PC Card and application program remain active. Hibernation Mode When in hibernation mode, the following occurs: The system status, RAM, VRAM, and setup data are stored on the hard disk.
Symptom-to-FRU Index The Symptom-to-FRU Index lists the symptoms and errors and the possible causes. The most likely cause is listed first. Note: Perform the FRU replacement or actions in the sequence shown in the FRU/Action columns. If a FRU does not solve the problem, put the original part back in the computer.
Error Code Message FRU/Action in Sequence 050 IDE Drive 0 Error Hard disk connection board Hard disk drive Planar board 054 IDE Drive(s) Disabled Hard disk drive cable Hard disk dr.
Beep Symptoms Symptom/Error FRU/Action in Sequence Five short beeps, power-on indicator turns on then off and LCD is blank. Ensure that "System Boot Drive" in the "System Secu- rity" menu of the BIOS Utility is not set to Drive A“.
Symptom/Error FRU/Action in Sequence No beep, power-on indicator turns on and LCD is blank. But you can see POST on an external CRT. Reconnect the LCD connec- tors.
Symptom/Error FRU/Action in Sequence No beep, power-on indicator turns on and LCD is blank. Power source (battery and adapter). See “Power Systems Check” on page 6. Reconnect the LCD connector Charger board CPU board Hard disk drive LCD inverter ID LCD LVDS board (for 14.
Indicator-Related Symptoms Symptom/Error FRU/Action in Sequence Indicator incorrectly remains off or on, but system runs cor- rectly. Reconnect the indicator board connector. Indicator board Power-Related Symptoms Symptom/Error FRU/Action in Sequence Power shuts down during operation.
Audio-Related Symptoms Symptom/Error FRU/Action in Sequence Internal speakers make noise or emit no sound. Speaker volume control Go to “Audio Function Check” on page 10. External speakers make noise or emit no sound. Speaker volume control Go to “Audio Function Check” on page 10.
Symptom/Error FRU/Action in Sequence Battery fuel-gauge doesn't go higher than 90%. Remove battery pack and let it cool for 2 hours. Refresh battery (continue using battery until power off, then charge the battery). Battery pack Charger board Planar board System configuration does not match the installed devices.
Modem-Related Symptoms Symptom/Error FRU/Action in Sequence Internal modem does not work correctly Go to “Modem Board Check” on page 12. Modem connector Modem board Planar board In.
7. If the problem remains, replace the following FRUs one at a time. Do not replace a non-defective FRU. TrackPoint board Charger board Audio & battery function connection board LC.
Related Service Procedures This section provides information about the following: “Flash Memory Update” “Status Indicators” “Power Switch” on page 29 “Diagnostic Program .
Symbol Color Meaning (1) Battery status Green Enough battery power remains for operation. Blinking orange The battery pack needs to be charged Orange The battery pack is being charged. (2) Standby mode Green The computer is in standby mode. Blinking green The computer is entering or resuming from hibernation mode.
Power Switch If the computer cannot be turned off by pressing the power switch, try pressing it for more than 4 seconds to force the system to shutdown. Diagnostic Program Diskette The Diagnostic Program Diskette (P/N: 09N1020) contains the PC Doctor diagnostics program.
2. Press the up and down arrow keys to move in a selected menu; then press Enter to enable the high- lighted option. Note: You can press F1 for help. Maintenance Program Diskette The Maintenance Progr.
Note: If the LCD has no display after changing the ID code, make sure you write the correct ID code or try reconnecting the LCD FPC cable connectors. Setting the Thermal Sensor: The system is equipped with sensors to protect against system over- heating.
Fn Key Combinations The following table shows the Fn key and function key combinations and their corresponding functions. The Fn key works independently of the operating system. The operating system obtains the status through the system management interface to control the system.
Product Overview The following shows an overview of the system features. Feature Description Processor Intel** Mobile Pentium** processor 366 MHz –or– Intel** Mobile Celeron** processor 366 MHz Bus architecture PCI System memory 32MB or 64MB DIMM card, maximum 128MB (144–pin SDRAM) CMOS RAM 256KB Video 12.
FRU Removals and Replacements This section contains information about removals and replacements. Do not damage any parts. Only certified and trained personnel should service the computer. The arrows in this section show the direction of move- ment to remove a FRU, or to turn a screw to release the FRU.
Before FRU Removals and Replacements Screw Type Example Explanation Note: Some screws have nylock paste (on the grooves) for better friction and increased stability.
Battery Assembly 1 2 3 Reverse the steps described above when installing a new battery pack. 36 ThinkPad i Series 1400.
DIMM and DIMM Cover 1 2 3 4 To install the DIMM: With the notched end of the DIMM toward the right side of the socket, insert the DIMM, at an angle of approximately 20°, into the socket; then press it firmly. Pivot the DIMM until it snaps into place.
Modem Board Cover and Modem Board 1 3 2 To remove the modem board: Disconnect the modem cable (4); then press the release latches on both sides of the modem board (5), and pull out the modem board (6). 5 6 4 Step Size (Quan- tity) Head & Color Torque Memo 2 M2 x 5L (2) Bind head, black 1.
Keyboard “Battery Assembly” on page 36 1 2 Note: Be careful not to scratch the surface of the name plate cover. 3 Step Size (Quan- tity) Head & Color Torque Memo 3 M2 x 4L (2) Pan head, silver 1.6 kgf-cm Note: Make sure you use the correct screw for replacement.
4 5 6 8 7 When replacing the keyboard, make sure that the 3 cables are clean and insert them directly into the connectors, making sure they contact with the bottom of the connector. Now press down on the latch of the connector to secure. Note: If the cables do not touch the bottom of the con- nector, the keyboard function will be rendered useless.
CPU Thermal Plate “Battery Assembly” on page 36 “Keyboard” on page 39 1 2 Step Size (Quan- tity) Head & Color Torque Memo 1 M2.5 x 6L (3) Bind head, black 3.2 kgf-cm w/ nylock paste Note: Make sure you use the correct screw for replacement.
RTC Battery, CPU EMI Shield and Hard Disk Drive “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 2 1 4 3 Safety Notice 4 The backup battery (1) is a lithium battery and can cause a fire, an explosion, or severe burns.
Reverse the steps described above when installing a new hard disk drive. CAUTION: Do not apply any shock to the hard disk drive. The hard disk drive is sensitive to physical shock. Incor- rect handling can cause damage and permanent loss of data on the hard disk.
PCMCIA Holder “Battery Assembly” on page 36 “Modem Board Cover and Modem Board” on page 38 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 1 Note: Before removing and replacing the PCMCIA holder, make sure that the PCMCIA cards are removed and the eject levers are not sticking out.
LCD Assembly “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 2 1 1 3 5 4 8 6 7 Note: For 14.1–inch LCD models, a LVDS board is addi- tionally installed as shown at 3. Step Size (Quan- tity) Head & Color Torque Memo 2 M2.
Step Size (Quan- tity) Head & Color Torque Memo 3 M2 x 14L (2) (for 12.1-inch LCD assembly) Pan head, silver 1.6 kgf-cm M2 x 20L (2) (for 14.1-inch LCD assembly) Pan head, silver 1.6 kgf-cm Note: Make sure you use the correct screw for replacement.
Upper Cover (Keyboard Bezel) “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 1 4 3 2 5 Step Size (Quan- tity) Head & Color Torque Memo 1 M2.
6 Note: The upper cover has several latches. When removing the upper cover from the base cover, gently release these latches, then raise the side of the upper cover facing the palm rest to remove it. Be careful not to break the latches. Step Size (Quan- tity) Head & Color Torque Memo 2 M2.
CD Control Card “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “L.
Trajection Board and Modem Connector (RJ11 Cable Assembly) “Battery Assembly” on page 36 “Modem Board Cover and Modem Board” on page 38 “Keyboard” on page 39 “CPU Thermal.
DC/DC Charger “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD.
Audio PCB and S-Video PCB “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 4.
Audio Cable and Speaker Cable “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on pa.
To install the speaker cable: When re-inserting the speaker cable, one end is connected to the Audio Con- nector Board underneath the palm rest. You then align the cable, following the border of the chassis and connect it to the inverter cable as shown in the diagram.
Audio Connector Board “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 “Upper Cover (Keyboard Bezel)” on page 47 2 1 Step Size (Quan- tity) Head & Color Torque Memo 1 M2.
Fan Assembly “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 “Upper Cover (Keyboard Bezel)” on page 47 3 2 1 4 Step Size (Quan- tity) Head & Color Torque Memo 2 M2.
Diskette and CD-ROM/DVD-ROM Drives Assembly “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk .
CD-ROM/DVD-ROM-drive-emergency-eject hole to open the CD/DVD tray. CD-ROM/DVD-ROM Module 3 2 1 1 CAUTION: Do not diassemble the CD-ROM/DVD-ROM; there is no user adjustments or serviceable parts inside. The use of controls, adjustments or performing procedures other than those specified may result in hazardous radiation exposure.
Diskette Drive (FDD with Bezel) 6 4 5 7 4 Step Size (Quan- tity) Head & Color Torque Memo 4 M2.5 x 3.5L (4) Bind head, black 1.6 kgf-cm w/ nylock paste Note: Make sure you use the correct screw for replacement.
Planar Board “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 “Upper Cover (Keyboard Bezel)” on page 47 2 1 4 3 Notes: 1.
LCD Front Cover (12.1-inch) “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 1 2 3 4 3 Note: When removing the LCD, take note of the following: 1.
2. The LCD front cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break these latches. 3. Gently push the two hooks (3) outward to remove the LCD front cover.
1 3 2 4 5 Note: There are adhesive tape attached to the micro- phone cable assembly. Do not forget to put them back when reinstalling. LCD Panel, LCD Cable and Inverter “Battery Assembly” on p.
1 2 4 1 3 7 8 5 6 Attention: After you replace the LCD or inverter, follow the instructions in “Setting the LCD Panel ID” on page 30. Step Size (Quan- tity) Head & Color Torque Memo 1 M3 x 5L (2) (LCD) Bind head, black 3.2 kgf-cm M2 x 4L (2) (Inverter) Pan head, silver 2.
Hinge “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 “LCD Front Cover (12.1-inch)” on page 61 2 2 1 Step Size (Quan- tity) Head & Color Torque Memo 1 M2.
LCD Front Cover (14.1-inch) “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 1 2 3 3 4 Note: When removing the LCD, take note of the following: 1.
2. The LCD front cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break these latches. 3. Gently push the two hooks (3) outward to remove the LCD front cover.
1 3 2 5 4 Note: There are adhesive tape attached to the micro- phone cable assembly. Do not forget to put them back when reinstalling. LCD Panel, LCD Cable and Inverter “Battery Assembly” on p.
1 2 1 3 4 5 6 7 8 Attention: After you replace the LCD or inverter, follow the instructions in “Setting the LCD Panel ID” on page 30. Step Size (Quan- tity) Head & Color Torque Memo 1 M3 x 5L (2) (LCD) Bind head, black 3.2 kgf-cm M2 x 4L (2) (Inverter) Pan head, silver 2.
2 2 1 Step Size (Quan- tity) Head & Color Torque Memo 1 M2 x 4L (4) Pan head, silver 2.0 kgf-cm Note: Make sure you use the correct screw for replacement.
Hinge “Battery Assembly” on page 36 “Keyboard” on page 39 “CPU Thermal Plate” on page 41 “RTC Battery, CPU EMI Shield and Hard Disk Drive” on page 42 “LCD Assembly” on page 45 “LCD Front Cover (12.1-inch)” on page 61 1 2 2 Step Size (Quan- tity) Head & Color Torque Memo 1 M2.
Locations Front View 1. LCD latches 2. LCD 3. Speakers 4. Indicator panel 5. Internal modem port 6. PC Card slots 7. PC Card eject buttons 8. Diskette drive 9. Diskette-drive-activity indicator 10. Diskette eject button 11. CD-ROM/DVD-ROM drive 12. CD-ROM/DVD-ROM eject button 13.
24. Fn key 25. Built-in microphone Bottom View 1. Battery-pack latch 2. Tilt feet 3. Memory slot door Rear View 3 4 5 6 7 8 9 10 11 12 13 14 15 2 1 1. Power jack 2. Universal serial bus (USB) connector 3. External-input-device (PS/2) connector 4. Serial connector 5.
13. Audio volume control 14. Battery pack Switch Locations There are two switches found on the system board. Refer to the tables below on how to set these switches. Note: There is no switch to set the CPU voltage and speed. The CPU board can sense the correct working voltage and speed itself.
System Unit Parts Listing 1 2 3 4 5 32 6 7 28 29 30 31 8 22 23 24 25 25-1 26 27 13 12 11 10 9 ThinkPad i Series 1400 75.
21-1 21 20 19 18 14 15 16 17 No. Description FRU No. Qty. 1 NAMEPLATE COVER ASM 10L1961 1 2 HEATSINK CPU 05K6236 1 3 PCMCIA HOLDER 05K5476 1 4 HDD MODULE ASSY 6.
No. Description FRU No. Qty. DIMM 64MB 10L1227 1 20 LI-ION BATTERY ASM (9 CELLS) 02K6577 1 21 BOTTOM CASE (W/ TV OUT) 05K6239 1 BOTTOM CASE (W/O TV OUT) 27L6572 1 21-1 LEG (L,R) 05K5953 1 22 RTC BATTE.
No. Description FRU No. Qty. KEYBOARD (API – 1ST SOURCE) KEYBOARD (US) 02K6368 1 KEYBOARD (JAPAN) 02K6382 1 KEYBOARD (GERMANY) 02K6370 1 KEYBOARD (TRADITIONAL CHINESE) 02K6383 1 KEYBOARD (DANISH) 02.
LCD Unit Parts Listing 12.1" LCD Unit Parts Listing 2 1 3-1 3 4 9 5-1 7 5 6 8 No. Description FRU No. Qty. 1 LCD BEZEL ASM 12.1" 05K5674 1 2 SPEAKER ASM (R,L) 05K2827 1 3 HINGE (R,L) 05K5669 1 3-1 HINGE COVER (R,L) 05K5949 1 4 12.1" TFT LCD (SANYO) 05K9528 1 5 FPC 12.
No. Description FRU No. Qty. 6 LCD INVERTER 12.1" 10L1380 1 7 LED BD 10L1168 1 8 LCD REAR COVER ASM 12.1" TFT 05K6303 1 9 CABLE ASSEMBLY 05K2798 1 LG/IBM LOGO KIT 05K6044 1 80 ThinkPad i Ser.
14.1" LCD Unit Parts Listing 3 2 1 3-1 4 9 10 9 5-1 11 12 5 6 7 8 No. Description FRU No. Qty. 1 LCD BEZEL ASM 14.1" 05K6232 1 2 SPEAKER ASM (R,L) FOR 14.1" 02K6299 1 3 HINGE (R,L) FOR 14.1" 05K6234 1 3-1 HINGE COVER (R,L) 05K5949 1 4 14.
No. Description FRU No. Qty. 5–1 LCD FPC HOLDER KIT 27L6477 1 6 LCD INVERTER 14.1" 10L1383 1 7 LED BD 14.1" 10L1315 1 8 LCD REAR COVER ASM 14.1" TFT 05K6231 1 9 14.1" TFT BRACKET (R,L) 05K6233 1 10 CABLE ASSEMBLY 05K2798 1 11 LVDS COVER 05K5960 1 12 LVDS BOARD 10L1318 1 LG/IBM LOGO KIT FOR 14.
Miscellaneous Parts Description FRU No. Qty. KITTING PACK FOR RUBBER RUBBER FOOT-F LCD SIDE SCREW CAP LCD BLIND CAP 05K5954 POINTING STICK CAP 84G6536 PORT REPLICATOR 05K5594 MYLAR PACK 05K6040 SCREW KIT SCREW MACH PAN M2*14L NI SCREW MACH PAN M2*4L NI SCREW WAFER NYLO M2.
Telephone/Modem Description FRU No. Qty. MODEM CABLE (GERMAN) 27L0441 MODEM CABLE (UK, NZ) 27L0442 MODEM CABLE (FRANCE) 27L0443 MODEM CABLE (HOLLAND) 27L0444 MODEM CABLE (SWEDEN) 27L0445 MODEM CABLE (.
Power Cord Description FRU No. Qty. US/CANADA/TAIWAN 76H3516 EUROPE 76H3518 UK 76H3524 ITALY 76H3530 SWITZERLAND 76H3528 JAPAN 13H5273 CHINA 02K0539 KOREA 76H3535 AUSTRALIA/NEW ZEALAND 76H3514 ThinkPa.
Notices References in this publication to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates. Any refer- ence to an IBM product, program, or service is not intended to state or imply that only IBM product, program, or service may be used.
IBM Part Number: 37L5192 Printed in U.S.A. S37L-5192-ðð.
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 IBM 140L 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 IBM 140L - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso IBM 140L imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul IBM 140L ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il IBM 140L, 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 IBM 140L.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il IBM 140L. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo IBM 140L 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.
