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LG Flatron L226WTM-SFQ.A**GQF Service Manual

Color monitor lg flatron l226wtm-sfq.a**gqf
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : LM62B
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
L226WTM(L226WTM-SFQ.A**GQF)

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Summary of Contents for LG Flatron L226WTM-SFQ.A**GQF

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM62B MODEL: L226WTM(L226WTM-SFQ.A**GQF) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............13 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......15 TIMING CHART ............8 WIRING DIAGRAM ..........19 DISASSEMBLY ............9 EXPLODED VIEW...........20 BLOCK DIAGRAM ..........10 REPLACEMENT PARTS LIST .......22 DESCRIPTION OF BLOCK DIAGRAM....11 SCHEMATIC DIAGRAM ......... 24 SPECIFICATIONS 1.

  • Page 3: Signal Connector Pin Assignment

    Signal Connector Pin Assignment • DVI-D Connector (Digital) Signal (DVI-D) Signal (DVI-D) T. M. D. S. Data2- Hot Plug Detect T. M. D. S. Data0- T. M. D. S. Data2+ T. M. D. S. Data2/4 Shield T. M. D. S. Data0+ T.

  • Page 4: Precautions

    PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) or marked on the schematic diagram and the inverter circuit, must disconnect the AC adapter...

  • Page 5: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 6 General Soldering Guidelines Replacement 1. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad and solder it.
  • Page 7 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...

  • Page 8: Timing Chart

    TIMING CHART VIDEO SYNC Total Video Sync Front Blanking Sync MODE Porch Time Resolution H / V Frequency Period Active Duration Polarity Clock ( E ) Time ( A ) ( D ) ( C ) ( B ) H(Pixels) 28.321 31.468 720 X 400...

  • Page 9: Disassembly

    DISASSEMBLY Pull the speaker and push the right. Remove the screws. Remove the screws. 1. Pull the front cover upward. 2. Then, let the all latches are separated with jig. (#4~5) Disassemble PCB. 1.Disassemble PCB. Disassemble back cover 2. Put the front face down. - 9 -...

  • Page 10: Block Diagram

    BLOCK DIAGRAM - 10 -...

  • Page 11: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is 146MHz In L226WT/WTM.

  • Page 12: Lips Board Block Diagram

    LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC ENERGY OUTPUT RECTIFIER INPUT RECTIFIER COMPONENTS TRANSFER AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- Collection COUPLER CONTROL ISOLATION CIRCUIT Feedback PRIMARY SECONDARY Operation description_Power 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

    ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Doesn’t need setup Windows 2000, XP => Need to Port Setup. This program is available for LCD Monitor only. 1.

  • Page 14: Service Osd

    SERVICE OSD 1) Turn off the power switch at the right side of the display. 2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) CLEAR ETI : To initialize using time.

  • Page 15: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND OUT A SHORT CHECK P702 VOLTAGE POINT AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK IC601(1.8V) IS IC601 PIN2(1.8V) IC602(3.3V) LINE IC602 PIN2(3.3V) CHECK IC501 PIN108 CHECK CRYSTAL(X501) PULSE CHECK IC501...
  • Page 16 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) CHECK P702 CHECK POWER BOARD VOLTAGE PIN5,6 (LIPS) (5V)? CHECK IC501 INVERTER P702 PIN9 5V? ON/OFF PORT 1. CONFIRM BRIGHTNESS OSD CONTRL STATUS CHECK P702 2.
  • Page 17 3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN NO RASTER (OSD IS NOT DISPLAYED) CHECK IC501 CHECK IC601(1.8V), PIN2(3.3V) IC602(3.3V) PIN17(1.8V) 1. CHECK PIN 108,109 U501 SOLDERING CONDITION PIN 108,109 2. CHECK X501 14.3MHZ? 3. TROUBLE IN IC501 CHECK IC501 PIN89(H-SYNC) AND CHECK CONNECTION LINE PIN90(V-SYNC).
  • Page 18 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK R720 AND PC IS GOING R726, SYNC INTO DPM MODE APPEARED? CHECK IC501 PIN89,90 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN IC501 Waveforms 1 H-SYNC 2 V-SYNC - 18 -...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM 6631900109A 6631T20034P 6631T12006E 6631V12031F 6401900160B - 19 -...

  • Page 20: Exploded View

    EXPLODED VIEW - 20 -...

  • Page 21: Exploded View Parts List

    Frame Assembly, L225W LM62A 23" Rear shield assy ,DVI,D-SUB,SPK ADV32121501 Frame Assembly, L226W LM62A 23" Lamp shield assy EBU35030501 Main Total Assembly, 12481010 L226WTM BRAND LM-62B LG ELECTRONICS MIDDLE EAST CO., LTD. 6871TPT318E PCB Assembly,Power, PLLM-M602A POWER T.T CMO L225W 22"Wide Scaler Dimming EBR33771801 PCB Assembly,Sub, CONTROL NT CKD T.T LM62B L225WT KRDGQFN L225WT NT CKD CONTROL...

  • Page 22: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2006. 10. 23. DATE: 2006. 10. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 23 DATE: 2006. 10. 23. DATE: 2006. 10. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION TRANSISTOR R729 0RJ0392D677 MCR03EZPJ390 39OHM 5% 1/10W Q502 0TRDI80002A MMBT3904-(F) NPN 6V 60V 40V R730 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W...

  • Page 24: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER - 24 -...
  • Page 25 2. POWER - 25 -...
  • Page 26 3. WAFER - 26 -...
  • Page 27 4. CONTROL - 27 -...
  • Page 28 Oct. 2006 P/NO : MFL301055 Printed in Korea...

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