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LG 42LC2RH Service Manual
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LG 42LC2RH Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LP62D
FACTORY MODEL : 42LC2RH-ZH
MODEL : 42LC2RH
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 42LC2RH

  • Page 1 LCD TV SERVICE MANUAL CHASSIS : LP62D FACTORY MODEL : 42LC2RH-ZH MODEL : 42LC2RH 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 ............... 26 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 LP62D 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 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 7. Model Specification Item Specification Remark Market Broadcasting system PAL BG/I/DK, SECAM Available Channel BAND VHF/UHF C1 ~ C69 CATV S1 ~ S47 Receiving system Upper Heterodyne SCART Jack(2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60 Video Input (2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60...
  • 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

    • Auto Component Color Balance adjustment Model Name - Standard equipment : MSPG925FA 42LC2RH-ZH 00 00 00 FC 00 34 32 4C 43 32 52 2D 48 4D 48 0A 20 20 • Auto RGB Color Balance adjustment e. Checksum: Changeable by total EDID data...
  • Page 12 5. ADC Calibration 5.1 Adjustment of RF/AV/S-VIDEO * Required Equipments • Remote controller for adjustment • 802F Pattern Generator, Master (MSPG-925FA), etc. • MSPG-925FA Pattern Generator (Which has Video Signal: 100% Color Bar Pattern shown in Fig. 1) (Fig. 2) = >...
  • Page 13 6. White Balance 6.2 Auto white Balance (AV) 1) LPL Module White balance ZH(AV3), TH(AV1) MH(VIDEO1) Data MSPG925FA 216 Level (85IRE) Model : 202 Model : 201 Command1 Command2 Set ID Full screen pattern • Pal Video • NTSC Video Input Select R-Gain =>...
  • 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,Tweeter, D013d02k1400 ND 15W 8OHM 84DB 0HZ 50 X 39.6 X 12.4 LUG EBR30937701 PCB Assembly,Sub, SUB T.T LP61C 42LC2RH-ZH ALEULFX CLOCK BOARD EBR30798701 PCB Assembly,Sub, 1234567 SUB T.T LP62A 37,42LC2RH-ZH ALEULFX PREAMP + LED LC 35519K0030B Cover Assembly, 42LC2 STAND 35509K0220B SUPPORT 49519S0036C...

  • Page 26: 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 27 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C898 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16 C1073 0CK104CK56A 0603B104K500CT 100nF 10% 50 C901 0CE226SF6DC VMV226M016S0ANB010 22uF 20% C1074 0CK104CK56A...
  • Page 28 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1238 0CK102CK56A 0603B102K500CT 1nF 10% 50V C229 0CK104CK56A 0603B104K500CT 100nF 10% 50 C1239 0CK102CK56A 0603B102K500CT 1nF 10% 50V C231 0CK273CK56A...
  • Page 29 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C876 0CK103CK56A 0603B103K500CT 10nF 10% 50V C109 0CC221CK41A C1608C0G1H221JT 220pF 5% 50 C877 0CK104CK56A 0603B104K500CT 100nF 10% 50 C110 0CC221CK41A...
  • Page 30 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1224 0CK103CK56A 0603B103K500CT 10nF 10% 50V C458 0CK332CK56A C1608X7R1H332KT 3.3nF 10% 5 C1225 0CC180CK41A C1608C0G1H180JT 18pF 5% 50V C459 0CK332CK56A...
  • Page 31 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION COIL & CORE & INDUCTOR D1000 0DS226009AA KDS226 1.2V 85V 300MA 2A 4N D1001 0DS226009AA KDS226 1.2V 85V 300MA 2A 4N L1000...
  • Page 32 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1477 0LCML00003B MLB-201209-0120P-N2 120OHM IC1006 0TF492509AA SI4925DY P-CHANNEL -30V +-2 R1478 0LCML00003B MLB-201209-0120P-N2 120OHM Q1202 0TF492509AA SI4925DY P-CHANNEL -30V +-2...
  • Page 33 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L1855 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R1849 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W L1857 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R1850 0RJ0332D677...
  • Page 34 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R233 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R534 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/1 R239 0RJ2201D677 MCR03EZPJ222 2.2KOHM 5% 1/1 R540 0RJ0000D677...
  • Page 35 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R134 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/1 R1017 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10 R135 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R1019 0RJ1002D677...
  • Page 36 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1814 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R372 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W R1815 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R376 0RJ3901D677...
  • Page 37 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R839 0RJ0562D677 MCR03EZPJ560 56OHM 5% 1/10W R1207 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W R840 0RJ0562D677 MCR03EZPJ560 56OHM 5% 1/10W R1208 0RJ1001D677...
  • Page 38 DATE: 2006. 05. 30. DATE: 2006. 05. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC201 6712SCA232A TSOP34838SO1 2.7TO5.5V 1.5M Q2002 0TR102008AA KRA102S PNP -30V - -50V -0. C200 0CH5101K416 C2012C0G1H101JT 100pF 5% 50 Q2003...
  • Page 39 Jun., 2006 P/NO : MFL30105533 Printed in Korea...

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