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LG 37LC3R-MH Service Manual
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LG 37LC3R-MH Service Manual

Chassis : lp62a
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LCD TV
SERVICE MANUAL
CHASSIS : LP62A
FACTORY MODEL : 37LC3R-MH / 42LC3R-MH
MODEL : 37LC3R / 42LC3R
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 37LC3R-MH

  • Page 1 LCD TV SERVICE MANUAL CHASSIS : LP62A FACTORY MODEL : 37LC3R-MH / 42LC3R-MH MODEL : 37LC3R / 42LC3R 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 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 5. General Specification Item Specification Remark Panel 37", 42" TFT WXGA LCD Frequency range H : 31 ~ 61KhzV : 56 ~ 75Hz PC Input Control Function 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset Component Jack Y/Pb/Pr : 1EA...
  • 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 - APC : Clear (Dynamic) White Coordinate Normal...
  • 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 d. Model Name/Monitor Name: Master pattern generator like MSPG-925) - If Minimum Black Level and/or Maximum White Model Name Level is not correct, Do select 100% Color Bar 37LC3R-ZH 00 00 00 FC 00 33 37 4C 43 33 52 2D 5A 48 0A 20 20 20 Pattern.
  • 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 -...

  • Page 24: Exploded View

    - 24 -...
  • Page 25 PCB Assembly,Sub, SUB T.T LN61A 37LC3R-ZH ALEULFX SIDE A/V ASSY-SKD 6709900016D SMPS,AC/DC, LGLP2637HEP 90.0VTO264.0V 215W 47TO63HZ UL/CSA/SEMKO YY / AT / HE or 6709900016B Power Supply Assembly, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 37INCH EBU32315901 Main Total Assembly, 37LC3R-ZH_AUO_CKD_MAIN BRAND LP62A EBU32110601...
  • Page 26 - 26 -...
  • Page 27 EXPLODED VIEW PARTS LIST(42LC3R) DESCRIPTION PART NO. ACQ30234904 Cover Assembly, 42LC3R-ZH LP62A 42" 42LC3R-ZH cabinet assy(C/SKD) 6304FLP363A LCD,Panel-TFT, LC420W02-SLA1 42INCH 1365X768 500CD COLOR 72% - ACQ30235303 Cover Assembly, 42LC3R-ZH LP61A 42" 42LC3R-ZH BACK COVER ASSY(C/SKD) ACQ30235403 Cover Assembly, 42LC3R-ZH LP61A 42" 42LC3R-ZH STAND ASSY(C/SKD) EAB30829201 Speaker,Woofer, g1560102 ND 15W 8OHM 82DB 100HZ 193 X 57 X 50 LUG EBR32312801...

  • 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. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C855 0CE226SF6DC VMV226M016S0ANB010 22uF 20% C1078 0CK103CK56A 0603B103K500CT 10nF 10% 50V C886 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16 C1079 0CK103CK56A 0603B103K500CT 10nF 10% 50V...
  • Page 30 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1243 0CK102CK56A 0603B102K500CT 1nF 10% 50V C348 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1247 0CK104CK56A 0603B104K500CT 100nF 10% 50 C350 0CC102CK41A...
  • Page 31 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C882 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1036 0CK104CK56A 0603B104K500CT 100nF 10% 50 C883 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1037 0CK104CK56A...
  • Page 32 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C430 0CK474CH94A 0603F474Z250CT 470nF -20TO+ C165 0CC102CK41A C1608C0G1H102JT 1nF 5% 50V C431 0CK474CH94A 0603F474Z250CT 470nF -20TO+ C166 0CC102CK41A C1608C0G1H102JT 1nF 5% 50V...
  • Page 33 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC800 0IPRP00692C FLI8662-LF-BC-XD 0TO5.5 25u L501 6200JB8010L MLB-201209-1000L-N2 1000OHM IC901 0IMMRHY052C HY5DU281622ETP-5 128MBIT 2M L503 6210TCE001G HH-1M3216-501JT 500OHM 3.2X...
  • Page 34 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L108 0LCML00020G MLI-201209-3R3K 3.3UH 10% 0 AR801 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W L109 0LCML00020G MLI-201209-3R3K 3.3UH 10% 0 AR802 0RJ0332C687...
  • Page 35 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R173 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W R218 0RJ4700D677 MCR03EZPJ471 470OHM 5% 1/10 R180 0RJ2203D677 MCR03EZPJ224 220KOHM 5% 1/1 R219 0RJ0822D677...
  • Page 36 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R506 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W R1019 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10 R507 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R1020 0RJ1002D477...
  • Page 37 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1815 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R400 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R1816 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R410 0RJ0622D677...
  • Page 38 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R840 0RJ0562D677 MCR03EZPJ560 56OHM 5% 1/10W R114 0RJ0822D677 MCR03EZPJ820 82OHM 5% 1/10W R841 0RH0202D622 MCR10EZHJ200 20OHM 5% 1/8W R115 0RJ0000D677...
  • Page 39 DATE: 2006. 07. 10. DATE: 2006. 07. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1895 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W-37LC3R R103 0RH1501D622 MCR10EZHJ152 1.5KOHM 5% 1/8 R1896 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W-42LC3R R104 0RH0000D622...
  • Page 44 Jun., 2006 P/NO : MFL30105535 Printed in Korea...

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