LG Flatron 206WTQ Service Manual
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LG Flatron 206WTQ Service Manual

LG Flatron 206WTQ Service Manual

Color monitor
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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
L206WTQ(L206WTQ-BFS.A**MQP,A**OQP)
L206WTQ(L206WTQ-WFS.A**MQP,A**OQP)
Internal Use Only

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Summary of Contents for LG Flatron 206WTQ

  • Page 1: Color Monitor

    Internal Use Only Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM74B MODEL: L206WTQ(L206WTQ-BFS.A**MQP,A**OQP) L206WTQ(L206WTQ-WFS.A**MQP,A**OQP) ) **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 ............14 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......16 TIMING CHART ............8 EXPLODED VIEW...........20 DISASSEMBLY ............9 REPLACEMENT PARTS LIST .......22 BLOCK DIAGRAM ..........11 DESCRIPTION OF BLOCK DIAGRAM....12 SCHEMATIC DIAGRAM ......... 25 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. Data2+ T. M. D. S. Data0- 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 Resolution H / V Frequency Period Active Duration Porch Time Polarity Clock ( E ) Time ( A ) ( D ) ( C ) ( B ) H(Pixels) 28.321 31.468 720 X 400...

  • Page 9: Disassembly

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

  • Page 11: Block Diagram

    BLOCK DIAGRAM LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 11 - Only for training and service purposes...

  • Page 12: 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 L226WTQ/WTG.

  • Page 13: Copyright 2007Lg Electronics. Inc. All Right Reserved

    LIPS Board Block Diagram 50 ~ 60Hz 67KHz HVDC ENERGY INPUT RECTIFIER OUTPUT RECTIFIER TRANSFER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLENT- CONTROL COUPLER CIRCUIT ISOLATION 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 14: 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 15: 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 16: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND OUT A SHORT CHECK J905 VOLTAGE POINT AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK U901(3.3V) IS U901 PIN2(3.3V) U902(1.8V) LINE U902 PIN2(1.8V) CHECK X501 PIN127 CHECK CRYSTAL(X501) PULSE CHECK U501...
  • Page 17 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) CHECK J905 CHECK POWER BOARD VOLTAGE PIN5,6 (LIPS) (5V)? CHECK U501 INVERTER J905 PIN9 3.3V? ON/OFF PORT 1. CONFIRM BRIGHTNESS OSD CONTRL STATUS CHECK J905 2.
  • Page 18 3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN NO RASTER (OSD IS NOT DISPLAYED) CHECK U501 CHECK U901(3.3V), PIN114(3.3V) U902(1.8V) PIN21(1.8V) 1. CHECK PIN 127,128 U501 SOLDERING CONDITION PIN 127,128 2. CHECK X501 14.3MHZ? 3. TROUBLE IN U501 CHECK U501 PIN32(H-SYNC) AND CHECK CONNECTION LINE PIN33(V-SYNC).
  • Page 19 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK R718 AND PC IS GOING R719, SYNC INTO DPM MODE 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 2007LG Electronics.

  • Page 20: Exploded View

    EXPLODED VIEW LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...

  • Page 21: Exploded View Parts List

    * Note: Safety mark Part No. Description EAJ35698601 LCD,Module-TFT, LM201WE3-TLE1 DRIVER 20.1INCH 1680X1050 300CD COLOR 72% 16/9 800:1 5ms, P6, 4lamp LG PHILIPS LCD EAJ38176901 LCD,Module-TFT, LM201WE3-TLH2 WSXGA 20.1INCH 1680X1050 300CD COLOR 72% 16/10 1000:1 5ms,TN,160/160,4CCFL,16.7M(6BIT+Hi-FRC),Non-Glare,Source:Lusem, Gate:OKI LG PHILI ABJ33081301 Cabinet Assembly, L206W LM62B 20"...

  • Page 22: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 06. 04. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ACCESSORY C539 0CC080CK11A "Capacitor,Ceramic,ChipC1608C0G1H0" SAB30967302 S/W Package[S-chassis L196/206/22 C540 0CC080CK11A "Capacitor,Ceramic,ChipC1608C0G1H0" 6410TUW008A "Power CordUL_CSA,LP-31 & SVT 18X3" C541 0CC080CK11A "Capacitor,Ceramic,ChipC1608C0G1H0"...
  • Page 23 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D707 0DS226009AA "Diode,SwitchingKDS226 1.2V 85V 30" R501 0RJ1000D677 "Resistor,ChipMCR03EZPJ101 100OHM" D708 0DS226009AA "Diode,SwitchingKDS226 1.2V 85V 30" R502 0RJ0562D677 "Resistor,ChipMCR03EZPJ560 56OHM 5" D709 0DS226009AA "Diode,SwitchingKDS226 1.2V 85V 30" R503 0RJ1000D677 "Resistor,ChipMCR03EZPJ101 100OHM"...
  • Page 24 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R730 0RJ2200D677 "Resistor,ChipMCR03EZPJ221 220OHM" R731 0RJ2200D677 "Resistor,ChipMCR03EZPJ221 220OHM" R732 0RJ1000D677 "Resistor,ChipMCR03EZPJ101 100OHM" R733 0RJ1000D677 "Resistor,ChipMCR03EZPJ101 100OHM" R735 0RJ2001D677 "Resistor,ChipMCR03EZPJ202 2KOHM 5" R736 0RJ4701D677 "Resistor,ChipMCR03EZPJ472 4.7KOHM" R737 0RJ4701D677 "Resistor,ChipMCR03EZPJ472 4.7KOHM"...

  • Page 25: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 25 - Only for training and service purposes...
  • Page 26 2. POWER & WAFER LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
  • Page 27 3. CONTROL LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 27 - Only for training and service purposes...

  • Page 28: Printed Circuit Board

    PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) CONTROL LGE Internal Use Only Copyright 2007LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
  • Page 29 Jun. 2007 P/NO : MFL38456740 Printed in Korea...

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