LG L207WT Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Monitor
  5. L207WT
  6. Service manual
LG L207WT Service Manual

LG L207WT Service Manual

Hide thumbs Also See for L207WT:
Table of Contents

Advertisement

Quick Links

See also: User Manual
COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM74B
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
L207WT(L207WT-PFS.A**HAP)
Internal Use Only
*To apply the MSTAR Chip.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the L207WT and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for LG L207WT

Summary of Contents for LG L207WT

  • Page 1 Internal Use Only Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM74B MODEL: L207WT(L207WT-PFS.A**HAP) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip.

  • Page 2: Table Of Contents

    SERVICE OSD ..................14 TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................19 EXPLODED VIEW ...................22 REPLACEMENT PARTS LIST ............... 24 SVC. SHEET ................... 27 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 2 - Only for training and service purposes...

  • Page 3: Precaution

    CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 3 - Only for training and service purposes...

  • Page 4: Servicing Precautions

    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. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 4 - Only for training and service purposes...
  • Page 5 IC. circuit board to prevent excessive component temperatures. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 5 - Only for training and service purposes...
  • Page 6 Solder the overlapped area and clip off any excess jumper wire. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 6 - Only for training and service purposes...

  • Page 7: Specification

    : 5.0 kg (11.02 lbs) 3-3. Operating Frequency Horizontal(Analog) : 30 ~ 83kHz Horizontal(Digital) : 30 ~ 83kHz Vertical : 56 ~ 75Hz LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 7 - Only for training and service purposes...

  • Page 8: Timing Chart

    H(Pixels) 64.674 1840 1680 1680x1050 V(Lines) 59.883 1080 1050 H(Pixels) 146.25 65.290 2240 1680 1680x1050 V(Lines) 59.954 1089 1050 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...

  • Page 9: Disassembly

    Pushing Latch inside, Take the stand base from stand body. (#2-1~2) # 2-2 Disassemble Stand Body Remove the screws. Remove the screws. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 9 - Only for training and service purposes...
  • Page 10 1. Pull the front cover upward. Disassemble back cover. 2. Then, let the latches are separated. 3. Put the front face down. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...

  • Page 11: Adjustment

    3.2 Adjustment order(refer to the Adjustment standard and 6500K, User Color and 9300K are saved adjustment command table) automatically. Do not Adjust 6500K for L207WT. 3.2.1 Board Assembly Line Connect input signal to 15pin D-sub. 3.2.4.3. Confirm at Total Assembly Line : adjustment...
  • Page 12 3.2.5.6. Confirm the display state by inputting 8 color Bar Power indicator : ON Pattern & 256 Gray Scale pattern. Flatron F-engine : Normal LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
  • Page 13 Click “ Write” button c) Remove all default number d) Add 300-3FF e) Click Start button. f) Click Exit button. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 13 - Only for training and service purposes...

  • Page 14: Service Osd

    (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...

  • Page 15: Trouble Shooting

    IS IC1 PIN2(3.3V) U902(1.8V) LINE U902 PIN2(1.8V) CHECK X501 PIN127 CHECK CRYSTAL(X501) PULSE CHECK U501 Waveforms J905-#5,6 IC1-#2 U902-#2 U501-#127 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 15 - Only for training and service purposes...
  • Page 16 WIRE OF THE LCD MODULE Waveforms J905-#5,6 J905-#9 REPLACE LCD MODULE J905-#9 (Brightness 100) J905-#10 (Brightness 0) LAMP CURRENT LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 16 - 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 U501-#127 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 17 - Only for training and service purposes...
  • Page 18 APPEARED? CHECK U501 PIN 32,33 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN U501 Waveforms 1 H-SYNC 2 V-SYNC LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...

  • Page 19: Block Diagram

    BLOCK DIAGRAM LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 19 - Only for training and service purposes...

  • Page 20: Description Of Block Diagram

    15V is provided for inverter in L207WT. 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 DC 15V to AC 700Vrms and operates back-light lamps of module in L207WT. 3. MICOM Part.

  • Page 21: Lips Board Block Diagram

    This part function is to collect the any change from the DC output and feed back to the primary through photo transistor. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 21 - Only for training and service purposes...

  • Page 22: Exploded View

    EXPLODED VIEW LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...

  • Page 23: Exploded View Parts List

    Base Assembly, BASE L1954T LM57B Normal Stand Base Assy with swivel ring MCK38602601 Cover MOLD ABS L1954 ABS L1954, COVER CABLE LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 23 - Only for training and service purposes...

  • Page 24: Replacement Parts List

    "Capacitor,Ceramic,Chip0603B104K" D705 0DSIH00018A "Diode,SwitchingENKMC2837-T112 1" C538 0CK104CF56A "Capacitor,Ceramic,Chip0603B104K" D706 0DSIH00018A "Diode,SwitchingENKMC2837-T112 1" C539 0CC080CK11A "Capacitor,Ceramic,ChipC1608C0G1" D707 0DSIH00018A "Diode,SwitchingENKMC2837-T112 1" LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...
  • Page 25 0RJ4701D677 "Resistor,ChipMCR03EZPJ472 4.7KO" R501 0RJ1000D677 "Resistor,ChipMCR03EZPJ101 100OH" R730 0RJ2200D677 "Resistor,ChipMCR03EZPJ221 220OH" R502 0RJ0562D677 "Resistor,ChipMCR03EZPJ560 56OHM" R731 0RJ2200D677 "Resistor,ChipMCR03EZPJ221 220OH" LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 25 - Only for training and service purposes...
  • Page 26 Packing542*70 MAIN PCB(B) 3918TKK040B Packing397*70 LB500J MAIN PCB(S 407-Q31U PackingL=1084.0 SYNTHETIC-PAPER MFZ38956601 PackingMOLD EPS L207WT EPS L207 3918TKK038J Packing538*390 LB500J PCB LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...

  • Page 27: Svc. Sheet

    PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) Copyright 2007 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
  • Page 28 CONTROL (TOP) CONTROL (BOTTOM) Copyright 2007 LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...
  • Page 29 1. SCALER Copyright 2007 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...
  • Page 30 2. POWER & WAFER Copyright 2007 LG Electronics. Inc. All right reserved. - 30 - LGE Internal Use Only Only for training and service purposes...
  • Page 31 3. CONTROL Copyright 2007 LG Electronics. Inc. All right reserved. - 31 - LGE Internal Use Only Only for training and service purposes...
  • Page 32 Jul. 2007 P/NO : MFL38456784 Printed in Korea...

Table of Contents