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LG 42PX4R Service Manual
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LG 42PX4R Service Manual

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

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  • Page 1 All manuals and user guides at all-guides.com website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html 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

    All manuals and user guides at all-guides.com CONTENTS SAFETY PRECAUTIONS ..................3 DESCRIPTION OF CONTROLS ................4 SPECIFICATIONS ....................9 ADJUSTMENT INSTRUCTIONS ...............11 TROUBLE SHOOTING GUIDE ................15 BLOCK DIAGRAM .....................24 EXPLODED VIEW ....................26 EXPLODED VIEW PARTS LIST ................27 REPLACEMENT PARTS LIST................28 SCHEMATIC DIAGRAM..................PRINTED CIRCUIT BOARD ..................

  • Page 3: Safety Precautions

    All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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.
  • Page 6 All manuals and user guides at all-guides.com 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>...
  • Page 7 All manuals and user guides at all-guides.com Displayable Monitor Specification RGB / HDMI mode Horizontal Vertical Resolution Frequency(KHz) Frequency(Hz) 31.468 70.09 640x350 37.861 85.08 31.469 70.08 720x400 37.927 85.03 31.469 59.94 35.000 66.66 640x480 37.861 72.80 37.500 75.00 43.269 85.00 31.500 60.00 848x480...
  • Page 8 All manuals and user guides at all-guides.com Accessories TV/AV MULTIMEDIA POWER MODE CABLE FAVOURITE Q.VIEW SIZE POSITION INDEX HOLD TIME REVEAL MODE Owner’s Manual Remote Control handset 2-Eye Bolts 1.5V Alkaline batteries Power Cord 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 9: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS NOTE : Specifications and others are subject to change without notice for improvement. Application Range This spec is applied to the 42”PDP TV used MF-056A Chassis. Specification Each part is tested as below without special appointment. 1) Temperature : 25±5°C (77±9°F), CST : 40±5 2) Relative Humidity: 65 ±...
  • Page 10 All manuals and user guides at all-guides.com 2. Model Specification Item Specification Remark Market PAL B/G/I/D/K, NTSC Broadcasting system BAND NTSC Available Channel VHF/UHF C1 ~ C69 2 ~83 CATV S1 ~ S47 1 ~ 71 Upper Heterodyne Receiving system PAL, SECAM.

  • Page 11: Adjustment Instructions

    All manuals and user guides at all-guides.com 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 12 All manuals and user guides at all-guides.com 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.
  • Page 13 All manuals and user guides at all-guides.com 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 Baud Rate Data bit Stop bit Parity before white Balance Adjustment 115200 NONE 6-2.
  • Page 14 All manuals and user guides at all-guides.com 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 15: Trouble Shooting Guide

    All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE 1. Power Board 1-1. The whole flowchart which it follows in voltage output state Start check Doesn't the Is it identical Is the Interface screen whole come with Power Off signal operated? out? condition?
  • Page 16 All manuals and user guides at all-guides.com 1-2. Sony Power Board Structure T502: Vs Trans T702: Va Trans T101: St-by Trans T103: Low Voltage Trans - 16 -...
  • Page 17 All manuals and user guides at all-guides.com 1-3. Sanken, LGIT Power Board Structure T221: Vs Trans T271: Va Trans T121: St-by Trans T201: Low Voltage Trans - 17 -...
  • Page 18 All manuals and user guides at all-guides.com 2. No Power (1) Symptom Does’t minute discharge at module. Ø Non does not come in into the front LED. Ø (2) Check following Is plug in power cord? Plug in power cord. Is the Line Filter and Power Connect the Cable.
  • Page 19 All manuals and user guides at all-guides.com 3. Protect Mode (1) Symptom After once shining, it does not discharge minutely Ø from module The Rely falls(The sound is audible “click”) Ø It is converted with the color where the front LED Ø...
  • Page 20 All manuals and user guides at all-guides.com 4. No Raster (1) Symptom Does’t minute discharge at module. Ø It maintains the condition where the front LED is green. Ø (2) Check following Is the Power Board Is output the normality Low/High Replace the normal? voltage except Stand-by 5V?
  • Page 21 All manuals and user guides at all-guides.com 5. In case of occurring strange screen into specific mode 5-1. In case the OSD does not displayed (1) Symptom LED is green Ø The minute discharged continuously becomes Ø accomplished from module (2) Check following Is the LVDS cable Is the LVDS cable...
  • Page 22 All manuals and user guides at all-guides.com 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 Ø (RF, AV, Component, RGB, DVI). (2) Check following Check the all input mode should become normality display.
  • Page 23 All manuals and user guides at all-guides.com 6. In case of no sound (1) Symptom LED is green Ø Screen display but sound is not output Ø (2) Check following Is the SPK cable Is the SPK cable Replace SPK cable normal? connected well? Cable inserts well.

  • Page 24: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM - 24 -...
  • Page 25 All manuals and user guides at all-guides.com MEMO - 25 -...

  • Page 26: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW - 26 -...

  • Page 27: Exploded View Parts List

    PWB(PCB) ASSEMBLY,DISPLAY YSUS ASSY HAND INSERT 42”HD 42X3 VER.B 6871QZH056B PWB(PCB) ASSEMBLY,DISPLAY ZSUS ASSY HAND INSERT 42”HD 42X3 VER.B 3091V00739G Cover Assembly, 42PX4R-ZA STEREO E_PHONE 3090V00634 AF-342 ABS LG 3091V00739N CABINET ASSEMBLY, 42PX4R-ZA STEREO E_PHONE LGEFS (SKD) 4980V01128B/ C Supporter, COMPLEX ASSY AL 0.8T TOP 4980V01130B/ C Supporter, COMPLEX ASSY AL 0.8T BOTTOM...

  • Page 28: Replacement Parts List

    All manuals and user guides at all-guides.com REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q1003 0TR387500AA CHIP 2SC3875S(ALY) BK KEC Q1004 0TR387500AA CHIP 2SC3875S(ALY) BK KEC IC1000 0IPRPML001A MIC39100 MICREL 3P SOT223 R/TP Q101 0TR387500AA CHIP 2SC3875S(ALY) BK KEC 0IMCRRH001A...
  • Page 29 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 31 All manuals and user guides at all-guides.com 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 32 All manuals and user guides at all-guides.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM 6200JB8010L MLB-201209-1000L-N2 R/TP 1000OHM 350MA L1004 L115 L1005 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM L119 6200JB8010L MLB-201209-1000L-N2 R/TP 1000OHM 350MA L1006 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM...
  • Page 33 UEJ-CV-032 10MM VERTICAL TYPE+SHIELD JK600 6612F00087A UEJ-CV-032 10MM VERTICAL TYPE+SHIELD ACCESSORIES 3828VA0525T MANUAL, USER MF056A 151E TX 6710V00151E REMOTE CONTROLLER, 42PX4R-ZA INPUT 64109EP003A POWER CORD, SP-023+IS-14 I-SHENG 6410TBW001B POWER CORD, SP60+IS14 I-SHENG BSI 1870MM 4972V00178A FIXER, WALL ASSY PDP SET MISCELLANEOUS...
  • Page 34 All manuals and user guides at all-guides.com...
  • Page 35 All manuals and user guides at all-guides.com...
  • Page 36 All manuals and user guides at all-guides.com...
  • Page 37 All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM ) SIDE A/V CONTROL(TOP) CONTROL(BOTTOM) INDEX(TOP) INDEX(BOTTOM)
  • Page 38 All manuals and user guides at all-guides.com Dec., 2005 P/NO : 38289S0052A Printed in Korea...

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