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LG FLATRON W2242T Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM73A
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
W2242T(W2242T-SFT.A***Q*)
W2242T(W2242T-BFT.A***Q*)
Internal Use Only

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Summary of Contents for LG FLATRON W2242T

  • Page 1 Internal Use Only Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM73A MODEL: W2242T(W2242T-SFT.A***Q*) W2242T(W2242T-BFT.A***Q*) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    8. WEIGHT (with TILT) Vertical : 56 ~ 75Hz : 4.65kg (10.33 lbs) Net. Weight : 6.35kg (14.11 lbs) Gross Weight Copyright 2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
  • Page 3 +5V Power Ground (return for +5V, H. Sync. and V. Sync.) T. M. D. S. (Transition Minimized Differential Signaling) Copyright 2007 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Precautions

    CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. Copyright 2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. Copyright 2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 IC. circuit board to prevent excessive component temperatures. Copyright 2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 Solder the overlapped area and clip off any excess jumper wire. Copyright 2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Timing Chart

    1680 x 1050 V(Lines) 59.883 1080 1050 H(Pixels) 146.25 65.290 2240 1680 1680 x 1050 V(Lines) 59.954 1089 1050 Copyright 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Disassembly

    Please pull off the latch first. Then separate stand body and base cover. - 9 - Copyright 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Block Diagram

    BLOCK DIAGRAM Copyright 2007 LG Electronics. Inc. All right reserved. - 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 2007 LG Electronics. Inc. All right reserved. - 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 2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Adjustment

    Click “ Write” button c) Remove all default number d) Add 300-3FF e) Click Start button. f) Click Exit button. Copyright 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only 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 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Troubleshooting Guide

    IS U602 PIN3(3.8V) U601(3.3V) LINE U601 PIN3(3.3V) CHECK U501 PIN108 CHECK CRYSTAL(X501) PULSE CHECK U501 Waveforms J703-#5,6 U602-#2 U601-#2 U501-#108 Copyright 2007 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 J703-#5,6 J703-#10 LAMP CURRENT Copyright 2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 PIN28(V-SYNC). FROM D-SUB TO U501 IS PULSE APPEARED AT SIGNAL PINS? TROUBLE IN CABLE OR LCD MODULE Waveforms U501-#108 Copyright 2007 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 PIN27,28 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN U501 Waveforms 1 H-SYNC 2 V-SYNC Copyright 2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM EAD37414504 EAD42157802 66631900030H Copyright 2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...

  • Page 20: Exploded View

    EXPLODED VIEW - 20 -...
  • Page 21 EXPLODED VIEW PARTS LIST * Note: Safety mark Ref. No. Part No. Description ABJ35705601 Cabinet Assembly,W2242T ... 21" W2242T BLACK ABJ35705603 Cabinet Assembly,W2242T ... 21" W2242T SILVER MEY40926601 Knob,MOLD ABS HF-350 MAIN 5 key WX42 BLACK MEY40926602 Knob,MOLD ABS HF-350 MAIN 5 key WX42 SILVER MBG41956001 Button,Power, MOLD ABS WX42 translucent ABS power button + lens ACQ35578401...
  • Page 26 NOV. 2007 P/NO : MFL32179240 Printed in China...

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