LG 42PX4R Service Manual
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LG 42PX4R Service Manual

LG 42PX4R Service Manual

Plasma tv
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PLASMA TV

SERVICE MANUAL

CHASSIS : MF-056A
MODEL : 42PX4R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
42PX4R-ZA
TV/AV
MENU
OK
VOL
PR
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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Summary of Contents for LG 42PX4R

  • Page 1: Service Manual

    PLASMA TV SERVICE MANUAL CHASSIS : MF-056A MODEL : 42PX4R 42PX4R-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. TV/AV MENU...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ..................3 DESCRIPTION OF CONTROLS ................4 SPECIFICATIONS ....................8 ADJUSTMENT INSTRUCTIONS ...............10 TROUBLE SHOOTING GUIDE ................14 BLOCK DIAGRAM .....................23 EXPLODED VIEW ....................24 EXPLODED VIEW PARTS LIST ................25 REPLACEMENT PARTS LIST................26 SCHEMATIC DIAGRAM..................PRINTED CIRCUIT BOARD .................. - 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by 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: Description Of Controls

    These buttons are used for teletext. gramme. For further details, see the ‘Teletext’ section. Note : In teletext mode, the PIP PR +/-, VCR BUTTONS SWAP and PIP INPUT buttons are used for Controls a LG video cassette recorder. teletext function. - 4 -...

  • Page 5: Location And Function Of Controls

    Location and Function of Controls <Front Panel Controls> TV/AV MENU TV/AV MENU 1. Power Button (Programme Up/Down) Switches the set on from standby or off to standby. Selects a programme or a menu item. Switches the set on from standby. 2.
  • Page 6 Location and Function of Controls - Shown is a simplified representation of the set. - Here shown may be somewhat different from your set. - This manual explains the features available on the 42PX4RV series / RT-42PX40 series. <Back Panel> A A V5 S-VIDEO VIDEO...
  • Page 7 Accessories TV/AV MULTIMEDIA POWER MODE CABLE FAVOURITE Q.VIEW SIZE POSITION INDEX HOLD TIME REVEAL MODE Remote Control handset Owner’s Manual 2-Eye Bolts 1.5V Power Cord Alkaline batteries 2-Wall brackets Joinning the set assembly to the wall to protect the set tumbling - Secure the set assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.

  • Page 8: Specifications

    1) Performance : LGE TV test method followed. 2) Demanded other specification Safety: CE, IEC specification EMC : CE, IEC Model Name Market Remark 42PX4R-ZA Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020 General Specification 1. General Specification Item Specification Remark...
  • Page 9 2. Model Specification Item Specification Remark Market Broadcasting system PAL B/G/I/D/K, NTSC BAND NTCS Available Channel VHF/ UHF C1~C69 2~83 CATV S1~S47 1~71 Receiving system Upper Heterodyne Scart Jack(3EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC,PAL60 PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC,PAL60 Video input(2EA) S-Video Input(3EA)

  • Page 10: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS 1. Application Object 3-2. Channel memory Method 1) Select “PDP” and “Hurricane” on Model dialog. And check These instructions apply to the MF-056A Chassis. your connection in Communication dialog. (If your connection is ‘NG’, then set your PORT(COM1,2,3,...) 2.

  • Page 11: Adjustment Method

    2) Connect RS-232C cable and turn on the power. (Use the 5. EDID (The Extended Display special Cable For Sub-program) (If your connection has Identification Data)/ DDC (Display completed, you can see “Ready”) Data Channel) download 5-1. Required Test Equipment 1) Adjusting PC with S/W for writing EDID Data.(S/W : EDID TESTER Ver.2.5) 2) A Jig for EDID Download...
  • Page 12 6. Auto AV(CVBS) Color Balance Auto adjustment Map(RS-232C) Type MF-056A : RT-42PX40/ RZ-42PX40 6-1. Required - This AV color balance adjustment should be performed befor Baud Rate Data bit Stop bit Parity white Balance Adjustment 115200 NONE 6-2. Required Equipment Index Cmd1 Cmd2 Data Min Value...

  • Page 13: White Balance

    8. Auto Component Color Balance 9. Default Value in Adjustment mode 8-1. Required Test Equipment 9-1. Auto Color Balance (Component/RGB) 1) Remote controller for adjustment 2) 802F Pattern Generator Auto Color Balance(HEX) (Which has 720p Ypbpr output & PC 1024x768 60Hz with Standard(0.7Vpp) Vertical 100% Color Bar Pattern as Fig.8) Auto-RGB To Set...

  • Page 14: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE 1. Power Board 1-1. The whole flowchart which it follows in voltage output state Start check Is it identical Doesn't the Is the Interface screen whole come with Power Off signal operated? out? condition? 1. Check the Power Off 2.
  • Page 15 1-2. Sony Power Board Structure T502: Vs Trans T702: Va Trans T101: St-by Trans T103: Low Voltage Trans - 15 -...
  • Page 16 1-3. Sanken, LGIT Power Board Structure T221: Vs Trans T271: Va Trans T121: St-by Trans T201: Low Voltage Trans - 16 -...

  • Page 17: No Power

    2. No Power (1) Symptom Does’t minute discharge at module. fl Non does not come in into the front LED. fl (2) Check following Is plug in power cord? Plug in power cord. Is the Line Filter and Power Connect the Cable. Board Cable connected? Is the Fuse(F101) on Replace the Fuse.
  • Page 18 3. Protect Mode (1) Symptom After once shining, it does not discharge minutely fl from module The Rely falls(The sound is audible “click”) fl It is converted with the color where the front LED fl is red from green. (2) Check following Is the Power Board Is output the normality Low/High Replace Power...
  • Page 19 4. No Raster (1) Symptom Does’t minute discharge at module. fl It maintains the condition where the front LED is green. fl (2) Check following Is the Power Board Is output the normality Low/High Replace the normal? voltage except Stand-by 5V? Power Board.
  • Page 20 5. In case of occurring strange screen into specific mode 5-1. In case the OSD does not displayed (1) Symptom LED is green fl The minute discharged continuously becomes fl accomplished from module (2) Check following Is the LVDS cable Is the LVDS cable Replace the cable.
  • Page 21 5-2. In case of does’t display the screen into specific mode (1) Symptom The screen does not become the display from specific input mode fl (RF, AV, Component, RGB, DVI). (2) Check following Check the all input mode should become normality display. fl...
  • Page 22 6. In case of no sound (1) Symptom LED is green fl Screen display but sound is not output fl (2) Check following Is the SPK cable Is the SPK cable Replace SPK cable normal? connected well? Cable inserts well. Is the RF/ AV/ Does IC400 Does IC401...

  • Page 23: Block Diagram

    BLOCK DIAGRAM - 23 -...

  • Page 24: Exploded View

    EXPLODED VIEW - 24 -...

  • Page 25: Exploded View Parts List

    POWER SUPPLY ASSEMBLY, MF056A HURRICANE2 FREE VOLTAGE SANKEN 6871VSMS18A PWB(PCB) ASSEMBLY,SUB A/V MF056B H2 50PX4R-ZB SIDE AV 4811V00357A BRACKET ASSEMBLY, SIDE AV MF056A SECOND TOOL FOR LGEMA PHANTOM 6500VR0002A SENSOR, YGCA-T068A LG INNOTEK AMBIENT LIGHT DIGITAL EYE ASSY - 25 -...

  • Page 26: Replacement Parts List

    REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q1001 0TR387500AA CHIP 2SC3875S(ALY) BK KEC Q1002 0TR387500AA CHIP 2SC3875S(ALY) BK KEC 0IPRPML001A IC1000 MIC39100 MICREL 3P SOT223 R/TP Q1003 0TR387500AA CHIP 2SC3875S(ALY) BK KEC IC1001 0IMCRRH001A BA033FP-E2 ROHM 3P-SOP,TO252-3 CHIP 2SC3875S(ALY) BK KEC Q1004...
  • Page 27 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 28 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 29 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 30 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION L1006 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM L120 6200JB8010L MLB-201209-1000L-N2 R/TP 1000OHM 350MA MLB-321611-0500P-N2 R/TP 500 OHM MLB-321611-0500P-N2 R/TP 500 OHM L1007 6200J000013 L1204 6200J000013 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM L1008 L1205...
  • Page 31 JK600 6612F00087A UEJ-CV-032 UGCOM EAR JACK 10MM ACCESSORIES 3828VA0525F MANUAL, USER MF056A LG 42PX4RV/EU 6710V00151E REMOTE CONTROLLER, AF05GB 42PX4R-ZA INPUT 6410VEH003C POWER CORD, M2511A-001 VDE/SEMKO 2800MM 4972V00178A FIXER, WALL NON ASSY PDP SET MISCELLANEOUS 6850J00005C CABLE,DVI LVDS UL20276 AWG30 600MM...
  • Page 35 PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM ) SIDE A/V(TOP) SIDE A/V(BOTTOM) CONTROL(TOP) CONTROL(BOTTOM) LED(TOP) LED(BOTTOM)
  • Page 36 Jun., 2005 P/NO : 3828VD0209S Printed in Korea...

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