Manuale d’uso / di manutenzione del prodotto L510B1 del fabbricante Daewoo
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D AEW OO ELECTR ONICS CO ., L TD . http : //svc.dwe .co .kr Service Manual XGA COLOR MONIT OR Model : L510B1 September , 2001.
SAFETY PRECAUTIONS 1 GENERAL SAFETY INFORMA TION 2 SER VICING PRECAUTIONS 3 TECHNICAL INFORMA TION 6 GENERAL INFORMA TION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REP AIR 8 OPERA TION & ADJUS.
1 SAFETY PRECAUTIONS ◆ Safety Check Care should be taken while servicing the inverter that generates the high voltage to lighten CCFL of the LCD panel. ◆ Fire & Shock Hazard • Insert an isolation transformer between the analog color display and AC power line before servicing the chassis.
2 GENERAL SAFETY INFORMATION ◆ T erms in the manual CAUTION Statements identify conditions or practices that could result in damage to the equipment or other property . W ARNING Statements identify conditions or practices that could result in personal injury or loss of life.
3 SERVICING PRECAUTIONS ◆ General Servicing Precautions 1. Always unplug the AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board, module, or any other instrument assembly . b. Disconnecting or reconnecting any electrical plug or other electrical connection.
4 ◆ Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity . Such components are commonly called Electrostatically Sensitive (ES) Devices. The typical examples of ES devices are integrated circuits, some field-effect transistors, and semiconductor “chip” components.
5 FIGURE 1. USE SOLDERING IRON TO PR Y LEADS ◆ IC Removal/Replacement Some utilized chassis circuit boards have slotted (oblong) holes through which the IC leads are inserted and then bent flat against the circuit foil. When holes are slotted, the following technique should be used to remove and replace the IC.
6 ◆ Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body . 2. Bend the two remaining leads perpendicularly to the circuit board. 3. Observing diode polarity , wrap each lead out of the new diode around the corresponding lead on the circuit board.
7 This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 62KHz, and all vertical frequencies from 50Hz to 75Hz. This TFT LCD monitor supports IBM PC, PC/XT , PC/A T , person.
8 Arrangement of 15-pin D-sub connector Pin Signal 1 Red 2 Green 3 Blue 4 GND 5 GND 6 GND - Red 7 GND - Green 8 GND - Blue 9 + 5Vdc 10 GND - H.Sync 1 1 GND - V .
9 Control Panel Hot Key EXIT A UTO MENU BRIGHTNESS • The AUTO button launches the AUT O TRACKING function directly . • The EXIT button turns the OSD (On-Screen Display) window off. • This button moves from sub menu to top menu in the OSD window .
10 Key Process OSD OFF MENU EXIT EXIT MENU EXIT MENU OSD OSD SHARPNESS SHARPNESS MENU UT L TY UT L TY UT L TY.
11 Adjustment Procedur e Adjust the CLOCK control. Perform the AUTO POSITION . Is the H.Size proper? Is the noise displayed on the screen? Perform the AUTO TRACKING . Is the noise displayed on the screen yet? Is the noise displayed on the screen yet? Adjust the CLOCK FINE until the screen is cleared.
12 Display horizontal & vertical frequency and polarity . STATUS Reset the screen to the Factory Preset Display Settings. RECALL AUTO POSITION Choose automatically the proper horizontal position and vertical position & size of the screen image.
13 Self Diagnosis When the monitor doesn’t display , if you press any key , Self Diagnosis screen is displayed. Self Diagnosis function checks if the status of the monitor is No Signal or Out of range. No Signal screen is displayed when the D-Sub signal connector is not connected or the status of the monitor is on DPMS mode.
14 Standard Check point 1. Power source : 100 - 240V ac, 50/60Hz. 2. Aging : T ake at least 20 minutes warm-up time. 3. Signal V ideo input : Analog 0.7Vpp 75 Ω terminal positive polarity Synchronizing : acceptable negative or positive at TTL level Max.
15 1. Abnormal mode detect Is a input H-sync of ADC(pin 90, U2) correct? Abnormal mode detect No No Yes Yes Is waveform of pin 81 of ADC(U2) correct? Trouble in the H-sync input circuit.
16 2. T rouble in Power on No No Yes Yes Is 5VS line normal(pin 8 of CN2)? Trouble in U6 & Q5 and its ambient circuit. Check the power board (5VS of CN2A). Check on Scaler(U1). Is the Power LED toggled between on and off? Off No Yes On Is the power cord well connected? Refer to No video or No raster.
17 3. No Raster Is 12V plugged in pin 1 of CN4A(power board)? No No Yes Yes Is the output of inverter correct? Check the output of D811(power board). Replace the inverter. Replace a LCD panal. < 2.5 > 2.5 Check the output of Q2 or pin 3 of U3. Trouble in Q6 or pin 3 of -com.
18 4. One color is missing Is the OSD color normal? One color is missing No Yes Check the output signal of Scaler. No Yes Is the input signal normal? Check the video signal cable or R,G,B con-ass’y. Trouble in the soldering of R,G,B data lines from output of ADC to Scaler(U1).
19 5. No V ideo Has display image only white? No Yes Next page. No Yes Connection trouble. Check the output of scalier (pin 71, 72, 73, 74, 75) and soldering of CN5. No Yes Is pin 1 of Q6 3.3V? Check Q6, its ambient circuit and pin 27 of -com. Check if the CN5 wafer is well connected at the LCD panel.
20 Is OSD normal? Black No No Yes Yes Is the contrast at its maximum? 3. No raster or Check SDRAM. Set the contrast up to Max. Next Page. Yes No Yes Is the output of ADC correct? No Yes Is the input of ADC correct? Check the video input signal. Replace the main board (or replace ADC).
21 No No Yes Yes Check 5VS, 5VD, 5VA, 6V, 3.3V of CN2A. Check the main board. Is the power cord well connected? Check if the power cord is correctly connected.
22 ASI320 Input Video Ra t e - H: 30~62kHz, V: 56~75Hz - Resolution: up to 1024*76 8 15PIN DSUB PRE-AMP Controller ADC PLL Offset & ampl ifier Buffer (74ACT14) Power Board Micom (MTV212M) EEPROM AC input rat e -Voltage: 100~240Va c -Frequency: 50/60 H z 12MHz DC-AV inverter ADI Scalar OSD 14.
23 24 Main PCB Component Side Main PCB Solder Side PCB LAYOUT.
25 Contr ol PCB Component Side Contr ol PCB Solder Side.
26 P ower & D-Sub PCB Component Side P ower & D-Sub PCB Solder Side.
27 Main Section SCHEMATIC DIAGRAM.
SMPS Section 28.
29 EXPLODED VIEW & MECHANICAL PARTS LIST.
30 RESISTOR Description Example: CAP ACIT OR Description Example: Fig & Part No Description Index Capacitors C28 HCFK104ZBA Chip Cera 50V Z C63 HCBK393KBA Chip Cera 50V K C44 HCQK102JBA Chip Cera 50V J T olerance C ± 0.
31 00020 W3415M731- CORD POWER C5 H03VV-F 3X0.75 1.8M BK 00040 9970800035 CABLE SIGNAL AS 15P+15P/DDC=1.5M(GY275A) B801 5PB13857-- COIL BEAD BI3857(AXIAL) C1 HCQK100JBA C CHIP CERA 50V CH 10PF J 1608 C10 HCBK223KBA C CHIP CERA 50V X7R 0.022MF K 1608 C101 HCENH101MD C CHIP ELECTRO MV 25V 100MF D8.
32 C69 HCEDC470MC C CHIP ELECTRO MV 6.3V 47MF 5DX5.2H C7 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 C70 HCEDC470MC C CHIP ELECTRO MV 6.3V 47MF 5DX5.2H C71 HCEKF100MC C CHIP ELECTRO MV 16V 10MF D4.0XH5.2 C72 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 C73 HCFK104ZBA C CHIP CERA 50V Y5V 0.
33 FB12 HFFTB2601B COIL CHIP BEAD TB321611Z260 FB13 HFFTB2601B COIL CHIP BEAD TB321611Z260 FB14 HFFTB2601B COIL CHIP BEAD TB321611Z260 FB15 HFFTB2601B COIL CHIP BEAD TB321611Z260 FB16 HFFTB2601B COIL .
34 R69 HRFS472JBA R CHIP 1/16 4.7K OHM J 1608 R72 HRFS102JBA R CHIP 1/16 1K OHM J 1608 R73 HRFS102JBA R CHIP 1/16 1K OHM J 1608 R80 RD-AZ302J- R CARBON FILM 1/6 3K OHM J R801 RD-2Z684J- R CARBON FILM .
DAEWOO ELECTRONICS CO., LTDD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P .O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : "DAEWOOELEC".
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 Daewoo L510B1 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 Daewoo L510B1 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Daewoo L510B1 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Daewoo L510B1 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Daewoo L510B1, 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 Daewoo L510B1.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Daewoo L510B1. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Daewoo L510B1 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.
