LG Flatron M203WA Service Manual
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LG Flatron M203WA Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CL-75
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
M203WA(M203WA-BZCB.A**BLF)

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Summary of Contents for LG Flatron M203WA

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-75 MODEL: M203WA(M203WA-BZCB.A**BLF) ) **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 ............12 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......15 SERVICE PRECAUTIONS ........4 WIRING DIAGRAM ..........20 TIMING CHART ............7 EXPLODED VIEW...........21 DISASSEMBLY ............8 REPLACEMENT PARTS LIST .......23 BLOCK DIAGRAM ........... 9 SCHEMATIC DIAGRAM ......... 30 DESCRIPTION OF BLOCK DIAGRAM ....

  • Page 3: 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 4: Service 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 5 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 6 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 7: Timing Chart

    TIMING CHART VIDEO SYNC Total Front Blank Frequency Display Sync. Mode H / V Polarity Period Porch Porch Resolution Clock [kHz] / [Hz] ( A ) ( C ) ( E ) ( D ) ( B ) H(Pixels) 28.321 31.468 720 X 400 V(Lines)

  • Page 8: Disassembly

    DISASSEMBLY Disassembly Hinge Cover. Remove the screws. Pull the speaker cover. Remove the screws. Disassemble back cover. Press down on cabinet and pull the back cover. Remove the screws. - 8 -...

  • Page 9: Block Diagram

    BLOCK DIAGRAM - 9 -...

  • Page 10: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Format Converter (MST9883C)(U702) This IC contain A/D converter, Pre-amp and PLL circuit that converting Analog video signal(0.7p-p RGB) to digital signal. (656 Format) 2. Power Supply Block (LIPS) This Block Generates DC Voltage (5V,15V) to Main Control system from AC Power (100-240 V, 50/60 Hz, 1.2A) The Minimum of Power efficiency is about 80%.

  • Page 11: Lips Board Block Diagram

    LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC ENERGY INPUT RECTIFIER OUTPUT RECTIFIER TRANSFER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLENT- COMTROL COUPLER CIRCUIT ISOLATI ON PRIMARY SECONDARY 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 12: 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 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.

  • Page 13: Service Osd

    SERVICE OSD ■ Description of operation - Elapsed time : Time used for back light - Nvram Initial : NVRAM reset - Teletext Language : Sets the Teletext Coad - WB Adjust : Adjusts the white balance - Card Reader ISP : The use the Card Reader ISP (Only M203WX) - Teletext TOP : The use the TOP (On / Off) - RGB Test : Adjusts RGB Gain, Offset, Sub-Contrast/Sub-Brightness ■...
  • Page 14 Video Signal Compatible PC Generator PARALLEL PORT Power inlet (required) 4.7K Power Select Switch 4.7K (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection - 14 -...

  • Page 15: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER No Power (Power Indicator Off) Check J901 Voltage Check Lips Pin #1,#2 : 15V Pin #5,#6 : 5V Change Micom Check Micom ID & Version Check Crack of Damage Check U903 Pin #3 : 3.3V Of Circuit Item Check U906 Pin #3 : 1.8V Around U903,U906...
  • Page 16 2. NO RASTER(OSD IS NOT DISPLAYED) No Raster (OSD Is Not Displayed) Check Pannel Link Change Pannel Link Cable Cable Check J401 Crack Change J401 Check Micom ID & Change Micom Version Check U918 Pin #2 : 2.5V Check U402 Waveforms U918-#2(2.5V) - 16 -...
  • Page 17 3. NO RASTER ON AV1, AV2, TV No Raster On Video Signal Check Cable of J106 Change Video Board Ass'y Change Video Board Ass'y Check Video Board Check U908 Pin #1,#3 : 5V, 3.3V Check Peripheral Circuit Check U909 Pin #3 : 1.8V In Case of TV In Case of AV1(Scart) Check Peripheral Circuit...
  • Page 18 4. NO RASTER ON Card Reader No Raster On Card Reader Check Chang FFC Cable FFC Cable of J104 Check Repair U502 Soldering U502 Check Signal of R527, C531, Repair the Point C528 in Card Reader Board Waveforms R527,C531,C528 - 18 -...
  • Page 19 5. NO SOUND No Sound Check input Signal waveform Check the Check a Signal of Peripheral IC C153~156 Of U201 Check the Cable of Change the Cable Main to Key Check the Cable of Change the Cable Key to Speaker Check Speaker Condition <<...

  • Page 20: Wiring Diagram

    WIRING DIAGRAM 6631T11012W 6631T20034P 6631T12006R 6631T20036E EAB31789901 - 20 -...

  • Page 21: Exploded View

    EXPLODED VIEW - 21 -...
  • Page 22 EXPLODED VIEW PARTS LIST * Note: Safety mark Ref. No. Part No. Description 3091TKL128L Cover Assembly, M203W BRAND L113 NON CR HF-350U(PAL/PAL-MULTI MONITOR TV) EAJ30235801 LCD,Module-TFT, CLAA201WA03Q DRIVER 20.1INCH 1680X1050 300CD COLOR 72% 16/10 600:1 WSXGA+,6MS,160/160,6LAMP 6304FCP007A LCD,Panel-TFT, CLAA201WA01 20.1INCH 1680X1050 300CD COLOR 72% - 3809TKL089N Cover Assembly, M203WA ...

  • Page 23: 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. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 24 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C484 0CH3104K566 0805B104K500CT 100nF 10% 50V C656 0CH3104K566 0805B104K500CT 100nF 10% 50V C487 0CH3104K566 0805B104K500CT 100nF 10% 50V C657 0CH3104K566...
  • Page 25 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C871 0CK475CC94A C1608Y5V0J475ZT 4.7uF -20TO+ C974 0CE107EF610 KMG16VB100M 100uF 20% 16V 12 C901 0CE477EH618 KMG5.0TP25VB470M 470uF 20% 2 C975 0CK104CK56A...
  • Page 26 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION U202 0IPRPTI034B "TPA6110A2DGNRG4,LF 2.5TO5.5" L106 6140TBZ007E SLF12575T-330M3R2 33UH 20% - U204 0IMMR00258A K4D263238I-UC50 128MBIT 1MX3 L107 6140TBZ007E SLF12575T-330M3R2 33UH 20% -...
  • Page 27 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R134 0RH1000D622 MCR10EZHJ101 100OHM 5% 1/8W R415 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 20 R135 0RH0222D622 MCR10EZHJ220 22OHM 5% 1/8W 2 R418...
  • Page 28 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R493 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 20 R680 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W R494 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W R681...
  • Page 29 DATE: 2006. 09. 21. DATE: 2006. 09. 21. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R878 0RJ1003D677 MCR03EZPJ104 100KOHM 5% 1/10 X401 6202TST001A SX-1 14.31818MHZ 30PPM 14.31 R879 0RH1003D422 MCR10EZHF104 100KOHM 1% 1/8W X601 6202TST003C...

  • Page 30: Schematic Diagram

    SCHEMATIC DIAGRAM 1. CONNECTOR & JACK - 30 -...
  • Page 31 2. MEMORY/ AUDIO AMP - 31 -...
  • Page 32 3. SCALER(GM1601) - 32 -...
  • Page 33 4. VUDEO DEC(VCT49XYI) - 33 -...
  • Page 34 5. MST9883C/TUNER/SCARTJACK - 34 -...
  • Page 35 6. POWER - 35 -...
  • Page 36 6. POWER - 36 -...
  • Page 37 Sep. 2006 P/NO : 38289S0041 Printed in Korea...

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