LG W2243C Service Manual Download Page 17 | Manualshive

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4. TROUBLE IN DPM

TROUBLE IN DPM

TROUBLE IN U201

CHECK PC

PC IS GOING

INTO DPM MODE

NO

CHECK H/V SYNC LINE

NO

YES

CHECK R619 AND

R612, SYNC

APPEARED?

CHECK

U201 PIN16,17

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

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Summary of Contents for W2243C

Page 1: ...Website 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 LM91G MODEL W2243C W2243C V Same model for Service Internal Use Only ...

Page 2: ...ype R G B Analog 2 Voltage Level 0 0 7 V 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 30 83kHz Vertical 56 75Hz 4 MAX RESOLUTION Analog 1920 x 1080 60Hz 5 POWER SUPPLY 5 1 Power Adaptor Built in Power Input AC 100 240V 50 60Hz 1 0A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 50 F 95 F 6 2 Relative Humidity 10 80 Non condensing 6 3 MTBF 50 000 HRS with 90 Co...

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: ...s 75 029 800 768 1 3 28 8 H Pixels 108 0 67 500 1600 1152 64 128 256 1152 x 864 V Lines 75 000 900 864 1 3 32 9 H Pixels 108 0 63 981 1688 1280 48 112 248 1280 x 1024 V Lines 60 02 1066 1024 1 3 38 12 H Pixels 148 50 67 50 2200 1920 88 44 148 1920 x 1080 V Lines 60 1125 1080 4 5 36 10 H Pixels 119 64 674 1840 1680 48 32 80 1680 x 1050 V Lines 59 883 1080 1050 3 6 21 11 H Pixels 146 25 65 290 2240 ...

Page 8: ...ont cover upward Separate the stand after separating 2 screws by using a driver as figure 2 Then let the all latches are separated 3 Put the front face down 5 Disassemble back cover Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only DISASSEMBLY Set ...

Page 9: ... 9 BLOCK DIAGRAM Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 10: ...ansmitter 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 22V is provided for inverter 5V is provided for LCD panel and micom in W2243C 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 DC22V to AC 700Vrms and operates back light lamps of m...

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 24C16 press key for over 3 sec e R G B 9300K Allows you to set the R G B 930...

Page 14: ...NG EACH POWER LINE CHECK IC1 1 8V IC1 3 3V LINE NO CHECK CRYSTAL X501 YES YES YES CHECK P605 VOLTAGE PIN5 PIN6 5V IS IC1 PIN3 1 8V IC1 PIN1 3 3V CHECK U201 PIN2 PULSE 1 2 1 3 1 4 Waveforms 1 U605 5 6 2 IC1 3 3 IC1 1 4 U201 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 15: ... NO NO NO 1 CONFIRM BRIGHTNESS OSD CONTRL STATUS 2 CHECK MICOM DIM ADJ PORT CHECK P605 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 P605 5 6 2 P605 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 1 8V U601 3 3V U201 PIN 1 2 14 3MHZ CHECK CONNECTION LINE FROM D SUB TO U201 TROUBLE IN CABLE OR LCD MODULE YES YES NO RASTER OSD IS NOT DISPLAYED CHECK U201 PIN16 H SYNC AND PIN17 V SYNC IS PULSE APPEARED AT SIGNAL PINS YES 1 Waveforms 4 U201 1 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 R619 AND R612 SYNC APPEARED CHECK U201 PIN16 17 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 EAD57188301 6631T20023T 6631900011J 30P 6P 11P Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 19: ...EXPLODED VIEW 19 910 440 920 430 400 410 450 460 420 200 300 330 310 320 ...

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Page 24: ...AUG 2009 P NO MFL61926859 Printed in China ...

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