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LG 37LC2R-ZH Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LP62A
FACTORY MODEL : 37LC2R-ZH / 42LC2R-ZH
MODEL : 37LC2R / 42LC2R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
e-mail:http://www.LGEservice.com/techsup.html
R
website:http://biz.LGservice.com

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Summary of Contents for LG 37LC2R-ZH

  • Page 1 LCD TV SERVICE MANUAL CHASSIS : LP62A FACTORY MODEL : 37LC2R-ZH / 42LC2R-ZH MODEL : 37LC2R / 42LC2R 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..............11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................23 EXPLODED VIEW .................. 24 REPLACEMENT PARTS LIST ............... 28 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 X-RADIATION, Shock, Fire, or other Hazards.
  • Page 4 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 3. Test method This specification is applied to LP62A chassis. 3.1 Performance : LGE TV test method followed 2. Requirement for Test 3.2 Demanded other specification Safety : CE, IEC Specification Testing for standard of each part must be followed in below EMC : CE, IEC...
  • Page 7 1366 x 768 Pixels RGB strip arrangement Coating Hard coating(3H), Anti-glare treatment of the front polarizer, Back Light 37" 16CCFL 42" 20CCFL 6. Set Optical Feature 6.1. 37LC2R-ZH(Only LPL Module)/42LC2R-ZH Parameter Symbol Value Unit Remark Contrast Ratio 37" 1200 (*) Normal Mode 42"...
  • Page 8 6.2. 37LC2R-ZH(Only AUO Module) Parameter Symbol Value Unit Remark Contrast Ratio 32", 37" 1200 (*) Normal Mode 42" 1000 - 100IRE Full white window pattern - APC : Clear (Dynamic) Surface Luminance, Cd/m (*) Normal Mode white - 100IRE Full white window pattern...
  • Page 9 8. Component Video Input (Y, PB, PR) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks 720 x 480 15.73 59.94 13.500 SDTV, DVD 480I(525I) 720 x 480 15.75 60.00 13.514 SDTV, DVD 480I(525I) 720 x 576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 720 x 480 31.47 59.94...
  • Page 10 11. HDMI Input ( PC ) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks 720 x 400 31.469 70.08 28.32 640 x 480 31.469 59.94 25.17 VESA(VGA) 640 x 480 37.500 75.00 31.50 VESA(VGA) 800 x 600 37.879 60.31 40.00 VESA(SVGA) 800 x 600 46.875 75.00 49.50...

  • Page 11: Adjustment Instruction

    1. Application Range 4. EDID This spec. sheet is applied to all of the LP62A/B/C Caution chassis(H3-High) manufactured at LG TV Plant all over the * Use the proper signal cable for EDID Download world. - Analog EDID : Pin3 exists - Digital EDID : Pin3 exists 2.
  • Page 12 Model Name Level is not correct, Do select 100% Color Bar 37LC2R-ZH 00 00 00 FC 00 33 37 4C 43 32 52 2D 5A 48 0A 20 20 20 Pattern. 42LC2R-ZH 00 00 00 FC 00 34 32 4C 43 32 52 2D 5A 48 0A 20 20 20 e.
  • Page 13 2) Execute the SET Heat Run for 30minutes 3) As below Fig. 4, Supply 216Level (85 IRE) full screen pattern to Video input. 37LC2R-ZH,42LC2R-ZH : AV3/AV4 (Input 50Hz), 32LB1R-TH : AV1/AV2 (Input 50Hz) 4) Press the FRONT-AV KEY on R/C for converting input mode.
  • Page 14 7. Shipping Conditions Item Condition Remark Power Volume Level Main Picture Input Main Last Channel Pr 01 Mute 16 : 9 Station Auto Programme Manual Programme Programme Edit Favorite Programme None Picture Dynamic Dynamic Contrast Brightness Colour Sharpness Normal Auto Advanced Reset Sound...
  • Page 15 SVC REMOCON FUNTION REAMARK To turn the TV on or off POWER To turn the TV on automatically if the power is supplied to the TV. (Use the POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function.

  • Page 16: Trouble Shooting

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  • Page 23: Block Diagram

    BLOCK DIAGRAM - 23 -...

  • Page 24: Exploded View

    - 24 -...
  • Page 25 Speaker,Woofer, G1560102 ND35 15W 8OHM 82DB 100HZ 193X57mM LUG 4814V00520B Plate, PRESS SPTE T0.5 PLATE RT-42PX40 SHIELD TUNER BOTTOM AP03NC SUS PRESS 68719ST105A PCB Assembly,Sub, SUB T.T LP62A 37LC2R-ZH ALEULFX PREAMP + LED LC 49509K0222A Plate, PRESS SBHG T2.0 SUPPORT STAND 37LC2 35509K0217A...
  • Page 26 - 26 -...
  • Page 27 Speaker,Woofer, G1560102 ND35 15W 8OHM 82DB 100HZ 193X57mM LUG 6400DTTX02A Speaker,Tweeter, EN15D-6629 TOPTONE TWEETER(DOME) 8OHM 15/20W 78DB OTHERS LC2 MODEL 68719ST105A PCB Assembly,Sub, SUB T.T LP62A 37LC2R-ZH ALEULFX PREAMP + LED LC 35519K0030B Cover Assembly, 42LC2 STAND 35509K0220B SUPPORT 35519K0030D...

  • Page 28: 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 29 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C898 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16 C328 0CK474CH94A 0603F474Z250CT 470nF -20TO+ C901 0CE226SF6DC VMV226M016S0ANB010 22uF 20% C329 0CK225DFK4A C2012Y5V1C225MT 2.2uF 20% 1...
  • Page 30 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C827 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1114 0CK104CK56A 0603B104K500CT 100nF 10% 50 C828 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1115 0CK104CK56A...
  • Page 31 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1435 0CK104CK56A 0603B104K500CT 100nF 10% 50 C444 0CK103CK56A 0603B103K500CT 10nF 10% 50V C1436 0CK104CK56A 0603B104K500CT 100nF 10% 50 C445 0CK471CK56A...
  • Page 32 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C895 0CK104CK56A 0603B104K500CT 100nF 10% 50 C139 0CK104CK56A 0603B104K500CT 100nF 10% 50 C896 0CK104CK56A 0603B104K500CT 100nF 10% 50 C141 0CK104CK56A...
  • Page 33 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC800 0IPRP00692B FLI8662-LF-AB-XD - - - PBGA L1001 6200J000013 MLB-321611-0500P-N2 500OHM IC901 0IMMR00002A K4D261638F-LC50 128MBIT 8MX L1002 6200J000013 MLB-321611-0500P-N2 500OHM...
  • Page 34 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L112 0LCML00020G MLI-201209-3R3K 3.3UH 10% - AR804 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W D1003 0DL233309AC SAM2333 RED/Y-GREEN 2.7V 2.
  • Page 35 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1447 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R348 0RJ1201D677 MCR03EZPJ122 1.2KOHM 5% 1/1 R1450 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W R349 0RJ1000D677...
  • Page 36 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R619 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R940 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W R621 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W L126 0RH0000D622...
  • Page 37 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1843 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W R227 0RJ2700D677 MCR03EZPJ271 270OHM 5% 1/10 R1844 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W R228 0RJ2200D677...
  • Page 38 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R514 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R110 0RJ4702D677 MCR03EZPJ473 47KOHM 5% 1/10 R515 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W R111 0RJ0822D677...
  • Page 39 DATE: 2006. 03. 30. DATE: 2006. 03. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION PREAMP&LED BOARD R856 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1-42LC2R R858 0RJ0000D677 "MCR03EZPJ000 0OHM 5% 1/10W-37LP2R, LPL C200 0CH5101K416 C2012C0G1H101JT 100pF 5% 50...
  • Page 44 Mar., 2006 P/NO : MFL30105508 Printed in Korea...

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