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LG 20LS2R Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LP69A
FACTORY MODEL : 20LS2R-ZA
MODEL : 20LS2R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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Summary of Contents for LG 20LS2R

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LP69A FACTORY MODEL : 20LS2R-ZA MODEL : 20LS2R CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 SAFETY PRECAUTIONS ................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 SERVICE REMOTE CONTROL...............14 TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................21 EXPLODED VIEW .................. 22 REPLACEMENT PARTS LIST ............... 24 SVC. SHEET ....................- 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as SAFETY PRECAUTIONS on page 3 of this publication.
  • Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to the 20”/ 23” Wide LCD TV used LP69A chassis. 3.1 Performance : LGE TV test method followed 3.2 Demanded other specification 2.
  • Page 7 5. Module Sepcification 5.1. LCD 20” (AUO T200MXW02 V0) Item Typ. Unit Remark Display area 443.61 (H) *249.41(V) Outline dimension 472.0 (H) x 276.5 (V) x23.0 (D) Number of Pixels 1366 (H) x 768(V) 1Pixel=3RGB Cells Cell pitch 324.75um (H) x 324.75um (V) µm 1Pixel=3RGB Cells Color arrangement...
  • Page 8 6. Model Specification Item Specification Remark Market Broadcasting system PAL BG/I/DK, SECAM-L/L’, SECAM BG/DK RF Input Channel : E2 ~ E12 : E21 ~ E69 CATV : S1 ~ S20 HYPER : S21~ S41 L/L’ : B, C, D FRANCE SCART Jack(1EA) PAL, SECAM, NTSC Video Input (1EA)
  • Page 9 9. RGB input ( DTV ) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed 720*480 31.47 59.94 27.000 SDTV 480P 720*480 31.50 60.00 27.027 SDTV 480P 720*576 31.25 50.00 27.000 SDTV 576P 1280*720 37.5 50.00 74.250 HDTV 720P 50Hz 1280*720 44.96 59.94 74.176 HDTV 720P 1280*720...

  • Page 10: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to 20”/ 23” LCD TV which is manufactured in TV (or Monitor) Factory or is produced on the basis of this data. filexxx.bin (7) ..OK 2. Specification 1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.
  • Page 11 (4) Confirm whether x = 0.283±0.03, y = 0.298±0.03 or not. to Product spec). 4.3. Confirm color coordinate of AV2 (1) 20LS2R EDID DATA (1) Set Input to AV2 1) ANALOG DATA 128Byte (2) Input signal : CVBS, PAL @ 50Hz...
  • Page 12 2) DIGITAL DATA 256Byte 4.11 Option data setting (SVC OSD setting) (1) PAL Model (Change by Suffix) Item Condition Remark Option1 200PR ACMS TEXT FLOF TOP / FLOF CH+AU 0 : Except below area 1 : China, Australia BOOSTER AGC Threshold point Option2 4.8.
  • Page 13 5. Adjustment Command (2) Command Set Adjustment contents CMD(hex) ADH(hex) ADL(hex) Details 5.1. Adjustment Commands(LENGTH=84) EEPROM READ 0-Page 0~7F Read 0-Page 80~FF Read Adjustment Contents Description (hex) 1-Page 0~7F Read FACTORY ON Factory mode on 1-Page 80~FF Read FACTORY OFF Factory mode off 2-Page 0~7F Read EEPROM ALL INIT.

  • Page 14: Svc Remocon

    SVC REMOCON FUNCTION REAMARK To turn the TV on or off POWER To turn the TV on automatically if the power is supplied to the TV. (Use POWER ON the POWER key to deactivate):It should be deactivated when delivered. To activate the mute function. MUTE Shortcut keys To check TV screen image easily.

  • Page 15: Trouble Shooting

    TROUBLE SHOOTING 1. No Power (LED indicator off) : [A] Process Fail Check 15V or Check 15V or ST_5V of Power B/D. ST_5V of Power B/D. Pass Fail Fail Check short of Re-soldering of Change Check Output of IC1100, IC1101. IC100, Q307.
  • Page 16 2. No RASTER : [B] Process Fail Check LED status Repeat A PROCESS. On Display Unit. Pass Fail Check Panel Link Change Panel Link Cable or Module. Cable or Module. Pass Fail Check Inverter Change Inverter Connector or Inverter. Connector or inverter.
  • Page 17 3. No RASTER on PC Signal Repeat [A, B] process. Pass Fail Check the input/ Check the J701. output of R735, R736. Pass Check Fail Re-soldering or Change the input/output the defect part. of R128, R131, R136. Pass Fail Check the Re-soldering or change the input/output of IC100.
  • Page 18 4. No Raster on Component Signal Repeat [A, B] process. Pass Fail Check the input/ Check the J900. output of R901. Pass Fail Check Re-soldering or Change the defect part. the input/output of R125. Pass Fail Check the Re-soldering or change the input/output of IC100.
  • Page 19 5. No Raster on HDMI Sinal Repeat [A, B] process. Pass Fail Re-soldering or change the Check the input/ defect part, Check the X100. output of IC100. Pass Check input source cable and jack. 6. No Raster on AV(Scart in 7.

  • Page 20: No Sound

    8. No sound Fail Check the input Change the source input. Sourse. Pass Fail Re-soldering of Change the defect part, Check input/Output Check the X110 ofIC100. Pass Fail Check the input/ Re-soldering of Change output of IC500 the defect part. Pass Fail Check the Speaker...
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  • Page 23: Exploded View

    PCB Assembly,Sub CONTROL T.T LP69A 20LS2R AEUWLAX 20LS2R CONTOL T.T ASS’Y MEY30552602 Knob, MOLD AB HF-380NB SUB CONTROL KNOB LS2R EAY32636402 Power Supply Assembly AIV-P0033 FREE 20LS2R LCD 20.1 INCH 16:9 WIDE 6 LAMP LIPS EBR33877501 PCB Assembly,Sub SUB T.T LP69A 20LS2R/23LS2R AEUWLAX/AEUULAX LS2 IR MES32968101...

  • Page 24: Replacement Parts List

    REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN, CH : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit in the CQ : Polyestor RS : Metal Oxide Film P/No. means as follows; CE : Electrolytic RN : Metal Film CF : Fixed Film RH : CHIP, Metal Glazed(Chip)
  • Page 25 DATE: 2006. 12. 28. DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C165 0CK225DFK4A C2012Y5V1C225MT 2.2uF 20% 16 C500 0CK225DK94A CL21F225ZBFNNNE 2.2uF -20TO+ C166 0CK225DFK4A C2012Y5V1C225MT 2.2uF 20% 16 C501 0CE476WH6DC MVK8.0TP25VC47M 47uF 20% 25V C167...
  • Page 26 DATE: 2006. 12. 28. DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C817 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16V ZD900 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60 C818 0CK104CK56A 0603B104K500CT 100nF 10% 50V ZD901 0DZ560009DA...
  • Page 27 DATE: 2006. 12. 28. DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L508 6210TCE001G HH-1M3216-501JT 500OHM 3.2X1 R1021 0RJ0561D677 MCR03EZPJ5R6 5.6OHM 5% 1/10W L509 6210TCE001G HH-1M3216-501JT 500OHM 3.2X1 R1022 0RJ0561D677 MCR03EZPJ5R6 5.6OHM 5% 1/10W...
  • Page 28 DATE: 2006. 12. 28. DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R159 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W R258 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W R162 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W R259 0RJ1000D677...
  • Page 29 DATE: 2006. 12. 28. DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R638 0RJ2700D677 MCR03EZPJ271 270OHM 5% 1/10W R903 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W R700 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W R904 0RJ0752D477...
  • Page 30 DATE: 2006. 12. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C5003 0CH3104K566 0805B104K500CT 100nF 10% 50V LED5000 0DLBE0138AA BL-BUBGE301 ROUND 3MM SUPER P5000 6602T20009D SMAW200-05P 5P 2.00MM 1R ANG P5001 387-T13E 387-T13E 35750-0910 5298T 16 PA5000 6712SCA232A TSOP34838SO1 2.7TO5.5V 1.5MA Q5001 0TR387500AA...
  • Page 33 Dec., 2006 P/NO : MFL37421403 Printed in Korea...

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