LG M2343A Service Manual
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LG M2343A Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LP63A
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
M2343A (M2343A-BZC.A**NLF)

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Summary of Contents for LG M2343A

  • Page 1 Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LP63A MODEL: M2343A (M2343A-BZC.A**NLF) ) **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 ............11 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......13 SERVICE PRECAUTIONS ........4 WIRING DIAGRAM ..........17 TIMING CHART ............7 EXPLODED VIEW...........18 DISASSEMBLY ............8 REPLACEMENT PARTS LIST .......20 BLOCK DIAGRAM ........... 9 DESCRIPTION OF BLOCK DIAGRAM ....10 SCHEMATIC DIAGRAM ..........29 SPECIFICATIONS 1.

  • 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 Back Display Sync. MODE section Polarity Frequency Resolution Period Porch Porch Clock ( A ) ( C ) ( E ) ( D ) ( B ) H(Pixels) 25.175 31.469 640 x 350 V(Lines) 70.8 H(Pixels) 28.321...

  • Page 8: Disassembly

    DISASSEMBLY Disassembly Back door. Remove the screws. Remove the screws. Open the Backcover's latch with Jig. Remove the 6 screws from each up of metal frame. Remove the 10 screws from each side of metal frame. - 8 -...

  • Page 9: Block Diagram

    BLOCK DIAGRAM - 9 -...

  • Page 10: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Format Converter (MST9883C)(U603) 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 DC-DC Converter (U313) This is TC DC Voltage (24V->5V) Main Control system from AC Adator 3.

  • Page 11: 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 12: Service Osd

    SERVICE OSD Description of operation SERVICE MENU - Nvram Initial : Reset the NVRAM Model Name : M2343A V1.00 - Teletext Language : Sets the Teletext Coad LP Elapsed Time : - WB Adjust : Adjusts the white balance Nvram Initial :...

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J301 Voltage Check Adaptor Jack Board Pin #12,#2 : 24V Change DC-DC Converter IC U313 IC Pin #13 : 24V (U313) Check Crack of Damage Check U317 Pin #3 : 3.3V Of Circuit Item Check U304 Pin #3 : 2.5V Around U317,U304...
  • Page 14 2. NO RASTER(OSD IS NOT DISPLAYED) NO RASTER (OSD IS NOT DISPLAYED) Check Pannel Link Change Pannel Link Cable Cable Check J801 Crack Change J401 J801 Check Change Micom #27,28,29,30 : 12V Check J103,104 Pin #12,15 : 24V(Inverter) Check U401(MST5151A) - 14 -...
  • Page 15 3. NO RASTER ON AV1, AV2, TV NO RASTER ON VIDEO SIGNAL Check Cable of J701,702 Change Video Board Ass'y Check Video Board Change Video Board Ass'y Check U317 Pin #3 : 3.3V Check Peripheral Circuit Check U909 Pin #1 : 5V In Case of TV AV1,2(Scart),AV3(CVBS) Svideo J903, 904 Cable...
  • Page 16 4. NO SOUND NO SOUND Check U201,202 Check Adaptor Jack Board Pin #1 : 24V Change the IC U201, 202 Check U201,202 Pin #7 : 5V (Amp IC) Check U203 Change the IC U203 Pin #4, 8 : 5V (TPA6110A2) Zarphun IC Check Speaker Condition - 16 -...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM 6631T11012W 6631T20033J 6631900061B main 6631T20028U 6631T10003R 6631T20023J video jack etc total adapter jack 6631T10003Q 6631T10003S headphone power key - 17 -...

  • Page 18: Exploded View

    EXPLODED VIEW - 18 -...

  • Page 19: Exploded View Parts List

    PCB Assembly,Sub, M2343A-BZB SKD ETC TOTAL BRAND RS-232C /CL-77 49519K0001D Plate Assembly, REAR M2343A-BZC, C- C/SKD 6871TSTT01B PCB Assembly,Sub, M2343A-BZB SKD ADAPTER JACK SUB TOTAL BRAND CL-77 6871TST805C PCB Assembly,Sub, M2343A-BZB VIDEO-JACK-SKD INTERFACE TOTAL M2343A ANRDLF LP63A 3551TKK563E Cover Assembly, L2343 REAR .. FOR M40 CHASSIS, D-C/SKD 6410VEH008A Power Cord, SP-022+IS-034 H05VV-F 3GX0.75mm2 CT-12_1.8M_BLK SP-22 IS-34 1.8M NONE 250V 10A/16A H05VV-F 3X0.75MM2 BLACK VDE SEMKO N...

  • Page 20: 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. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 21 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C336 0CK104CK56A 0603B104K500CT 100nF 10% 50V C482 0CK104CK56A 0603B104K500CT 100nF 10% 50V C337 0CE337EJ618 KMG5.0TP35VB330M 330uF 20% 3 C483 0CK104CK56A...
  • Page 22 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C654 0CK104CK56A 0603B104K500CT 100nF 10% 50V C870 0CK475DD57A C2012X5R1A475KT 4.7uF 10% 10 C655 0CK104CK56A 0603B104K500CT 100nF 10% 50V C871 0CK475DD57A...
  • Page 23 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION DIODEs ZD823 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 D101 0DSIH00018A ENKMC2837-T112 1.2V 85V 300M ZD901 0DZ910009FE UDZS9.1B 9.1V 8.85TO9.23V 30 D102...
  • Page 24 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L605 6210TCE001G HH-1M3216-501JT 500OHM 3.2X1 R113 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1 L808 6210TCE001H HB-1T2012-301JT 300OHM 2X1.2 R114 0RJ4701D677...
  • Page 25 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R221 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 20 R422 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1 R222 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 20...
  • Page 26 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R602 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W R694 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W R603 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W R695 0RJ1002D677...
  • Page 27 DATE: 2006. 04. 07. DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R906 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W R913 0RJ2701D677 MCR03EZPJ272 2.7KOHM 5% 1/10 R907 0RJ2202D677 MCR03EZPJ223 22KOHM 5% 1/10W R914 0RJ7501D677...
  • Page 28 DATE: 2006. 04. 07. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD920 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 ZD921 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 ZD922 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 ZD923 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 ZD924 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 ZD925 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60...

  • Page 29: Schematic Diagram

    SCHEMATIC DIAGRAM 1. CONNETOR & JACK - 29 -...
  • Page 30 2. MEMORY/ AUDIO AMP - 30 -...
  • Page 31 3. SCALER(GM1601) - 31 -...
  • Page 32 4. VUDEO DEC(VCT49XYI) - 32 -...
  • Page 33 5. MST9883C/TUNER/SCARTJACK - 33 -...
  • Page 34 6. POWER - 34 -...
  • Page 35 7. VIDEO JACK - 35 -...
  • Page 36 8. POWER BOARD-1 - 36 -...
  • Page 37 9. POWER BOARD-2 - 37 -...
  • Page 38 10.RS232C - 38 -...
  • Page 39 11. EARPHONE PART - 39 -...
  • Page 40 12. CONTROL - 40 -...
  • Page 41 Nov. 2006 P/NO : 38289S Printed in Korea...

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