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Related Manuals for LG FLATRON L227WGP
Summary of Contents for LG FLATRON L227WGP
- Page 1 Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM74D L227WGP(L227WGP-PFS.A***APN) MODEL: ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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Page 2: Table Of Contents
: 30 ~ 83kHz Vertical : 56 ~ 75Hz Net. Weight : 5.00 kg (11.1 lbs) : 6.40kg (14.11 lbs) Gross Weight Copyright 2008 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes... - Page 3 (return for +5V, H. Sync. and V. Sync.) T. M. D. S. (Transition Minimized Differential Signaling) Copyright 2008 LG Electronics. Inc. All right reserved. - 3 - - 3 - LGE Internal Use Only Only for training and service purposes...
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Page 4: Precautions
CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. Copyright 2008 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes... - Page 5 Always remove the test receiver ground lead last. Copyright 2008 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only - 5 - Only for training and service purposes...
- Page 6 IC. circuit board to prevent excessive component temperatures. Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 6 - - 6 - Only for training and service purposes...
- Page 7 Solder the overlapped area and clip off any excess jumper wire. Copyright 2008 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
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Page 8: Timing Chart
V(Lines) 59.883 1080 1050 H(Pixels) 146.25 65.290 2240 1680 1680 x 1050 V(Lines) 59.954 1089 1050 Copyright 2008 LG Electronics. Inc. All right reserved. - 8 - - 8 - LGE Internal Use Only Only for training and service purposes... -
Page 9: Disassembly
Pull the front cover upward,then separate all the latches. Place the monitor face down,then disassemble back cover. Copyright 2008 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes... -
Page 10: Block Diagram
BLOCK DIAGRAM Copyright 2008 LG Electronics. Inc. All right reserved. - 10 - - 10 - LGE Internal Use Only Only for training and service purposes... -
Page 11: Description Of Block Diagram
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable. The controlled data of each modes is stored in EEPROM. Copyright 2008 LG Electronics. Inc. All right reserved. - 11 - - 11 - LGE Internal Use Only... - Page 12 This part function is to collect the any change from the DC output and feed back to the primary through photo transistor. Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 12 - Only for training and service purposes...
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Page 13: Adjustment
Click “ Write” button c) Remove all default number d) Add 300-3FF e) Click Start button. f) Click Exit button. Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes... - Page 14 (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection Copyright 2008 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
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Page 15: Troubleshooting Guide
CHECK IC601(1.8V) IC602(3.3V) LINE IC1 PIN2(3.3V) CHECK U501 PIN108 CHECK CRYSTAL(X501) PULSE CHECK U501 Waveforms P702-#5,6 IC601-#2 IC602-#2 IC501-#108 Copyright 2008 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes... - Page 16 POWER BOARD (LIPS) TO THE LAMP WIRE OF THE LCD MODULE REPLACE LCD MODULE Waveforms P702-#5,6 P702-#10 LAMP CURRENT Copyright 2008 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
- Page 17 PIN33(V-SYNC). FROM D-SUB TO U501 IS PULSE APPEARED AT SIGNAL PINS? TROUBLE IN CABLE OR LCD MODULE Waveforms IC501-#108 Copyright 2008 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
- Page 18 INTO DPM MODE APPEARED? CHECK U501 PIN32,33 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN U501 Waveforms 1 H-SYNC 2 V-SYNC Copyright 2008 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
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Page 19: Wiring Diagram
WIRING DIAGRAM 6631900109A 6631T20023J 6631900030G 6631V12031A Copyright 2008 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes... -
Page 20: Exploded View
EXPLORE VIEW - 20 -... - Page 21 SCHEMATIC DIAGRAM 1. SCALER - 21 - Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 22: Replacement Parts List
2. POWER&WAFER - 22 - Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 23 3. CONTROL - 23 - Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 24 4. POWER - 24 - Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 25: Schematic Diagram
5. POWER - 25 - Copyright 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 26 Aug. 2008 P/NO : MFL30290897 Printed in China...