LG FLATRON W1752T Service Manual
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LG FLATRON W1752T Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM 72A
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
W1752T(W1752T-PFT.K***A** )
Internal Use Only
Website:http://biz.LGservice.com

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Summary of Contents for LG FLATRON W1752T

  • Page 1 Internal Use Only Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM 72A MODEL: W1752T(W1752T-PFT.K***A** ) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    Vertical : 56 ~ 75Hz : 2.8 kg (6.17 lbs) Net. Weight : 4.04 kg (8.91 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

    900 V(Lines) 59.90 H(Pixels) 55.935 1904 1440 1440x 106.500 V(Lines) 59.887 H(Pixels) 70.635 1936 1440 1440x 136.750 V(Lines) 74.984 Copyright 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Disassembly

    DISASSEMBLY Put a cushion or soft cloth on a flat surface. Slide the Cable Deco Cover out from the stand body. Place the monitor face down on the cushion or soft cloth. Press the hook,Take off the stand base from stand body. Please pull the stand body lightly to separate it from the hinge body.

  • 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 LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC SWITCHING INPUT RECTIFIER OUTPUT RECTIFIER TRANSFORMER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PWM CONTROL COLLENT- PHOTO-COUPLER CIRCUIT ISOLATION PRIMARY SECONDARY INVERTER CIRCUIT High Voltage Operation description_LIPS 1. EMI components. This part contains of EMI components to comply with global marketing EMI standards like FCC,VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse.

  • 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 U601 PIN2(3.3V) U602(1.8V) LINE U602 PIN2(1.8V) CHECK U501 PIN97 CHECK CRYSTAL(X501) PULSE CHECK U501 Waveforms J703-#5,6 U601-#2 U602-#2 U501-#97 Copyright 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 WIRE OF THE LCD MODULE Waveforms J703-#5,6 J703-#9 REPLACE LCD MODULE J703-#10 (Brightness 100) J703-#10 (Brightness 0) 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-#96 Copyright 2007 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 APPEARED? CHECK U501 PIN 37,28 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 Copyright 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Exploded View

    Description LM171WX3-TLA1 WXGA 17.1INCH 1280X720 250CD COLOR 60% 16/10 800:1 LPL 17"W EAJ38936201 response time :8ms,P4,Color Depth:16.7M. Viewing Angle:160/160 LG PHILIPS LCD HSD170MGW1-B00 WXGA 17.0INCH 1440X900 250CD COLOR 63% 16/10 600:1 Hannstar 17"W ZBD, EAJ39167201 2CCFL(Edge type),16.2M, Viewing Angle 80/80/80/80. Non-Glare. HANNSTAR DISPLAY CORPORATION ABJ35701501 Cabinet Assembly,W1752T .

  • Page 21: Replacement Parts List

    D710 0DD184009AA “Diode Assembly,KDS184 KDS184 TP KEC” R603 0RJ3900D677 “Resistor,Chip,MCR03EZPJ391 390OHM” D711 0DSIH00018A “Diode,Switching,ENKMC2837-T112 1.2V” R604 0RJ1002D677 “Resistor,Chip,MCR03EZPJ103 10KOHM” Copyright 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...
  • Page 22 “Switch,Tact,KMB-903/TMB-901 1C1P” EBF37991701 “Switch,Tact,KMB-903/TMB-901 1C1P” EBF37991701 “Switch,Tact,KMB-903/TMB-901 1C1P” 6600R000133 “Switch,Tact,JTP1280A6 1C1P 12VDC” OTHERs 0DLGP0128AA “LED,Chip,GPTD1210YBC BLUE/YEL” X501 6212AA2001G “Crystal,HLX-U-F-14.31818M-18” Copyright 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 22 - Only for training and service purposes...

  • Page 23: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER Copyright 2007 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 2. POWER & WAFER Copyright 2007 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 3. CONTROL Copyright 2007 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 26 Nov. 2007 P/NO : MFL30290861 Printed in China...

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