LG 22LG30R Service Manual
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LG 22LG30R Service Manual

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See also: Owner's Manual
LCD TV

SERVICE MANUAL

CHASSIS : LP81K
MODEL : 22LG30R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
22LG30R-MA

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Summary of Contents for LG 22LG30R

  • Page 1: Service Manual

    Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LP81K MODEL : 22LG30R 22LG30R-MA 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 ..............9 TROUBLE SHOOTING ................13 BLOCK DIAGRAM...................19 EXPLODED VIEW .................. 20 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 SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • 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 This specification is applied to LCD TV used LP81K chassis. 2. Requirement for Test Each part is tested as below without special appointment. (1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC (2) Relative Humidity : 65±10% (3) Power : Standard input voltage (100-240V~, 50/60Hz)
  • Page 7 4. LCD Module Item Typ. Max. Unit Remark Min. Maker Luminance(CR≥10) cd/m 22”LPL PSM : Vivid, CSM : Medium, WHITE(100IRE) View angle (R/L, U/D) 160/160 degree CR >10 Color Coordinate White Typ. 0.285 Typ. PSM : Vivid, CSM : Medium, WHITE(85IRE) -0.015 0.293 +0.015...
  • Page 8 7. HDMI/DVI input (PC) Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark 640*480 31.469 59.94 25.17 VESA(VGA) 800*600 37.879 60.31 40.00 VESA(SVGA) 1024*768 48.363 60.00 65.00 VESA(XGA) 1280*1024 63.981 60.02 108.0 VESA(SXGA) 1680*1050 65.290 59.954 146.25 WXGA+ 8. HDMI/DVI input (DTV) Resolution H-freq(kHz) V-freq.(kHz)

  • Page 9: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Range (3) Click the Config button and Change speed E2PROM Device setting : over the 350Khz This specification sheet is applied to 22” LCD TV which is manufactured in TV Factory or is produced on the basis of this data.
  • Page 10 - Convert to Component in Input-source - Input the Component ( Which has 720p@60Hz YPbPr signal : 100% Color Bar (MSPG-925F Model : 217/ Pattern: 65 ) into Component. 4-1. 22LG30R-MA EDID DATA <Analog : 128bytes> [Fig. 2] <HDMI : 256bytes>...
  • Page 11 1) All Data : HEXA Value (3) Enter the adjust mode of white balance 2) 1Changeable Data - Enter the white balance adjustment mode with aging * Serial No : Controlled/ Data : 01 command(F3, 00, FF) ** Month : Controlled/ Data :00 *** Year : Controlled **** Check sum * Luminance min value is 190cd/m2 in the cool mode (For LCD)
  • Page 12 6. DDC Adjustment Command * Purpose 1) EDID write : 16-byte by 16-byte, 8 order (128-byte) write(TO “00 – 7F” of “EEPROM Page A6”). Adjustment Contents Description (hex) 2) FOS Default write Aging On/Off FF/00 FF : ON / OO : OFF <14-mode data>write Input select 0x10 : TV...

  • Page 13: Trouble Shooting

    TROUBLE SHOOTING 1. No Power (LED indicator off) : [A] Process Fail Check 15V or Check short of Main B/D ST_5V of Power B/D. or Change Power B/D. Pass Fail Fail Check short of Re-soldering or Change Check Output of IC1000, IC1006.
  • Page 14 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 15 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 R125, R128, R123. Pass Fail Check the Re-soldering or change the input/output of IC100.
  • Page 16 4. No Raster on Component Signal Repeat [A, B] process. Pass Fail Check the input/ Check the JK800. output of R801. Pass Fail Check Re-soldering or Change the defect part. the input/output of R109. Pass Fail Check the Re-soldering or change the input/output of IC100.
  • Page 17 5. No Raster on HDMI Signal Repeat [A, B] process. Pass Fail Re-soldering or change the defect part. Check the input/ Check the X100. output of IC100. Pass Check input source cable and jack. 6. No Raster on AV(Scart in 7.
  • Page 18 8. No sound Fail Check the input Change the source input. Source. Pass Fail Re-soldering of Change the defect part. Check input/Output Check the X100 of IC100. Pass Fail Check the input/ Re-soldering or Change output of IC500 the defect part. Pass Fail Change Speaker.

  • Page 19: Block Diagram

    BLOCK DIAGRAM - 19 -...

  • Page 20: Exploded View

    EXPLODED VIEW - 20 -...
  • Page 21 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Mar., 2008 P/NO : MFL423054034 Printed in Korea...

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