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LG Flatron W1642C, Service Manual

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LG Flatron W1642C Service Manual Download Page 15

- 15 -

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS

CHECK U501 INVERTER

ON/OFF PORT

J703 PIN9 5V?

NO RASTER

(OSD IS NOT DISPLAYED)

CHECK POWER BOARD

(LIPS)

CHECK J703

VOLTAGE PIN5,6

(5V)?

NO

NO

NO

NO

1. CONFIRM BRIGHTNESS

OSD CONTRL STATUS

2. CHECK MICOM DIM-ADJ 

PORT

CHECK J703 

PIN10

POWER BOARD (LIPS)

CHECK 

PULSE AS 

CONTACTING PROBE 

TO THE LAMP 

WIRE OF THE 

LCD MODULE

REPLACE LCD MODULE

YES

1

2

3

YES

YES

YES

Waveforms

1

J703-#5,6

2

J703-#10

3

LAMP CURRENT

Copyright 

2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for Flatron W1642C

Page 1: ...ite http biz LGservice com E mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO LM73B MODEL W1642C W1642C PFT A AP Same model for Service Internal Use Only ...

Page 2: ...Type R G B Analog 2 Voltage Level 0 0 71 V a Color 0 0 0 Vp p b Color 7 0 0 467 Vp p c Color 15 0 0 714 Vp p 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 30 61kHz Vertical 56 75Hz 4 MAX RESOLUTION Analog 1360 x 768 60Hz 5 POWER SUPPLY 5 1 Power Adaptor Built in Power Input AC 100 240V 50 60Hz 0 8A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 50 F 95 F 6 2 Re...

Page 3: ...cuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe it off with a softmaterial Cleaning with a dirty or rough ...

Page 4: ...fore connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such componen...

Page 5: ...h an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to the areas Small Signal Discrete Transistor Removal ...

Page 6: ...ut away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on the component side of the circuit board 1 Remove the defec...

Page 7: ... 128 88 V Lines 40 0 60 317 628 600 1 4 23 800 x 600 H Pixels 46 875 1056 800 16 80 160 V Lines 49 5 75 0 625 600 1 3 21 800 x 600 H Pixels 49 725 1152 832 32 64 224 V Lines 57 283 74 55 667 624 1 3 39 832 x 624 H Pixels 48 363 1344 1024 24 136 160 V Lines 65 0 60 0 806 768 3 6 29 1024 x 768 H Pixels 60 123 1312 1024 16 96 176 V Lines 78 75 75 029 800 768 1 3 28 1024 x 768 H Pixels 47 776 1664 128...

Page 8: ...the latch first Pull the cabinet upwards Then separate all latches on each side Remove the control button from cabinet Then disassemble the connector 1 4 Turn around the base lock to open the lock between base cover and stand body 6 2 3 5 Then separate stand body and base cover 7 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 9: ...OM System EEPROM System 3 3V 1360X768 60Hz 136Mhz Dual Interface Engine Display Processing Engine Response Time Enhancement LVDS Panel Interface OSD Clock Generator MCU DRAM TSUMU58BWHL Flash ROM Flash ROM 3 3V Crystal Crystal 14 318MHz BLOCK DIAGRAM Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 10: ... 2 Power Part This part consists of the one 3 3V and one 1 8V regulators to convert power which is provided 5V in Power board 18V is provided for inverter 5V is provided for LCD panel and micom in W1642S case Also 5V is converted 3 3V and 1 8V by regulator Converted power is provided for IC in the main board The inverter converts from DC18V to AC 700Vrms and operates back light lamps of module in ...

Page 11: ... This part function is for transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized and also the over power protection is also mon...

Page 12: ...serPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button Copyright 2007 LG Electronics Inc All right reserved Only for training and service ...

Page 13: ...al 3 The SVC OSD menu contains additional menus that the User OSD menu as described below a CLEAR ETI To initialize using time c Auto Color W B balance and Automatically sets the gain and offset value press key for over 3 sec d AGING Select Aging mode on off b Module To select applied module d NVRAM INIT EEPROM initialize 24C08 press key for over 3 sec e R G B 9300K Allows you to set the R G B 930...

Page 14: ...CH POWER LINE CHECK U602 1 8V U601 3 3V LINE NO CHECK CRYSTAL X501 YES YES YES CHECK J703 VOLTAGE PIN5 PIN6 5V IS U602 PIN3 3 8V U601 PIN3 3 3V CHECK U501 PIN108 PULSE 1 2 1 3 1 4 Waveforms 1 J703 5 6 2 U602 2 3 U601 2 4 U501 108 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 15: ...O NO NO 1 CONFIRM BRIGHTNESS OSD CONTRL STATUS 2 CHECK MICOM DIM ADJ PORT CHECK J703 PIN10 POWER BOARD LIPS CHECK PULSE AS CONTACTING PROBE TO THE LAMP WIRE OF THE LCD MODULE REPLACE LCD MODULE YES 1 2 3 YES YES YES Waveforms 1 J703 5 6 2 J703 10 3 LAMP CURRENT Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 16: ... 1 8V U601 3 3V U501 PIN 108 109 14 3MHZ CHECK CONNECTION LINE FROM D SUB TO U501 TROUBLE IN CABLE OR LCD MODULE YES YES NO RASTER OSD IS NOT DISPLAYED CHECK U501 PIN27 H SYNC AND PIN28 V SYNC IS PULSE APPEARED AT SIGNAL PINS YES 1 Waveforms 4 U501 108 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 17: ...S GOING INTO DPM MODE NO CHECK H V SYNC LINE NO YES CHECK R730 AND R731 SYNC APPEARED CHECK U501 PIN27 28 SYNC PULSE YES 1 H SYNC 2 V SYNC Waveforms 1 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 18: ...WIRING DIAGRAM 18 66631900030J 30P 6P 11P EAD37414503 EAD42157802 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 19: ...EXPLODED VIEW 19 300 320 310 410 420 400 430 910 920 440 020 060 070 080 120 ...

Page 20: ...BS W1642 ABS 920 MCK42616001 Cover MOLD ABS HF 350 W1642 ABS Base cover 020 EAJ42583301 LCD Module TFT M156B1 L01WXGA15 6INCH1366X768250CDCOLOR65 16 9500 1CMO15 6 W TN ZBD Non Glare 2CCFL 16 7M Responsetime 8ms ViewingAngle 90 45 CHIMEIOPT EBR41617001 PCB Assembly CONTROL T T LM73A BAIKAL 3 19 INCH RD EBU43054601 Main Total Assembly W1642 MSTAR ANALOG BRAND LM73B Power Supply Assembly FREE W1642 L...

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Page 25: ...JAN 2008 P NO MFL62186901 Printed in China ...

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