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LG 37LC2R-TH Service Manual
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LG 37LC2R-TH Service Manual

LG 37LC2R-TH Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LP62C
FACTORY MODEL : 37LC2R-TH / 42LC2R-TH
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-TH

  • Page 1 LCD TV SERVICE MANUAL CHASSIS : LP62C FACTORY MODEL : 37LC2R-TH / 42LC2R-TH 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 .................. 25 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 LP62C 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-TH/42LC2R-TH Parameter Symbol Value Unit Remark Contrast Ratio 37" 1200 (*) Normal Mode 42"...
  • Page 8 6.2. 37LC2R-TH/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-TH 00 00 00 FC 00 33 37 4C 43 32 52 2D 54 48 0A 20 20 20 Pattern. 42LC2R-TH 00 00 00 FC 00 34 32 4C 43 32 52 2D 54 48 0A 20 20 20 e.
  • Page 13 => Caution : Before White-balance, the AV ADC should 6.2 Auto white Balance (AV) be done. (ZH:AV3, TH:AV1, MH:VIDEO1) 1) LPL Module Data => After Aging, When the procedure is changed White Command1 Command2 Set ID balance adjustment, it will be canceled Heat_run mode auto.
  • 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 -...
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  • Page 25: Exploded View

    Plate, FRAME, MAIN 37LC2R(C/SKD) 4950TKA361L Plate, FRAME, MAIN 37LC2R-atsula 68719STA69A PCB Assembly,Sub, SUB T.T LP62C 37LC2R-TH AURDLFX SIDE A/V 37LC TH 6709900016D SMPS,AC/DC, LGLP2637HEP 90.0VTO264.0V 215W 47TO63HZ UL/CSA/SEMKO YY / AT / HE 33139L3049A Main Total Assembly, 37LC2R-TH BRAND LP62A-C/SKD...
  • Page 26 - 26 -...
  • Page 27 EXPLODED VIEW PARTS LIST(42LC2R) EXPLODED VIEW PARTS LIST(42LC2R) EXPLODED VIEW PARTS LIST(42LC2R) EXPLODED VIEW PARTS LIST(42LC2R) DESCRIPTION DESCRIPTION DESCRIPTION DESCRIPTION PART NO. PART NO. PART NO. PART NO. 30919E0047H 30919E0047H 30919E0047H 30919E0047H Cover Assembly, 42LC2R BRAND 30909E0028 ZH C/SKD Cover Assembly, 42LC2R BRAND 30909E0028 ZH C/SKD Cover Assembly, 42LC2R BRAND 30909E0028 ZH C/SKD Cover Assembly, 42LC2R BRAND 30909E0028 ZH C/SKD 6304FLP363A...

  • 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. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C898 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16 C337 0CK474CH94A 0603F474Z250CT 470nF -20TO+ C901 0CE226SF6DC VMV226M016S0ANB010 22uF 20% C338 0CK474CH94A 0603F474Z250CT 470nF -20TO+...
  • Page 30 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C874 0CK103CK56A 0603B103K500CT 10nF 10% 50V C1134 0CK104CK56A 0603B104K500CT 100nF 10% 50 C881 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1136 0CK104CK56A...
  • Page 31 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1461 0CK104CK56A 0603B104K500CT 100nF 10% 50 C514 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1466 0CK104CK56A 0603B104K500CT 100nF 10% 50 C603 0CC221CK41A...
  • Page 32 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C910 0CK104CK56A 0603B104K500CT 100nF 10% 50 D502 0DS226009AA KDS226 1.2V 85V 300MA 2A 4N C911 0CK103CK56A 0603B103K500CT 10nF 10% 50V...
  • Page 33 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L1404 6140VB0032A DBF-1015A 15.5uH - - 10.8X1 L1014 6210TCE001G HH-1M3216-501JT 500OHM 3.2X-SKD L1405 6140VB0032A DBF-1015A 15.5uH - - 10.8X1 L1015 6200J000013...
  • Page 34 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L207 0LC6461201A D75C-646CY-121M=P3 120UH 20 AR804 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W L120 0LCML00020G MLI-201209-3R3K 3.3UH 10% - AR805 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W...
  • Page 35 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1442 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R347 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 R1447 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R348 0RJ1201D677...
  • Page 36 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R609 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 R938 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W R619 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R940 0RJ0222D677...
  • Page 37 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R184 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W R224 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R1842 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W R225 0RJ2000D677...
  • Page 38 DATE: 2006. 04. 05. DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R512 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W L1819 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R513 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W L1820 0RJ0000D677...
  • Page 39 DATE: 2006. 04. 05. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R107 0RH1501D622 MCR10EZHJ152 1.5KOHM 5% 1/8 R108 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 2 PREAMP&LED BOARD C200 0CH5101K416 C2012C0G1H101JT 100pF 5% 50 C201 0CH5330K416 C2012C0G1H330JT 33pF 5% 50V C202 0CE476VF6DC VGV476M016S0ANE010 47uF 20%...
  • Page 44 Mar., 2006 P/NO : MFL30105507 Printed in Korea...

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