LG 50PX4D Service Manual
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LG 50PX4D Service Manual

LG 50PX4D Service Manual

Chassis : df-054b
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See also: Owner's Manual
PLASMA TV
SERVICE MANUAL
CHASSIS : DF-054B
MODEL : 50PX4D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
50PX4D-EB
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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Summary of Contents for LG 50PX4D

  • Page 1 PLASMA TV SERVICE MANUAL CHASSIS : DF-054B MODEL : 50PX4D 50PX4D-EB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ..................3 DESCRIPTION OF CONTROLS ................4 SPECIFICATIONS ....................8 ADJUSTMENT INSTRUCTIONS ...............10 TROUBLE SHOOTING GUIDE ................15 PRINTED CIRCUIT DIAGRAM ................24 BLOCK DIAGRAM .....................28 EXPLODED VIEW ....................30 EXPLODED VIEW PARTS LIST ................31 REPLACEMENT PARTS LIST................32 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

    DESCRIPTION OF CONTROLS D/A TV POWER selects analogue or digital mode. switches the set on from standby or off to standby. MODE INPUT Selects another device. INPUT Selects the TV, AV, Component, RGB or D/A TV POWER HDMI modes. GUIDE shows a programme schedule.
  • Page 5 <Front Panel Controls> INPUT 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. Remote Control Sensor (Volume Up/Down) Adjusts the volume. 3.
  • Page 6 <Back Panel> A A V5 S-VIDEO AC INPUT 1. PCMCIA (Personal Computer Memory Card 8. COMPONENT INPUT International Association) Card Slot Connect DVD video outputs to Y, P of COMPONENT INPUT and audio outputs to Audio sockets of AUDIO 2. ANTENNA INPUT/OUTPUT INPUT.
  • Page 7 Accessories D/A TV INPUT POWER MODE TEXT MUTE LIST Q.VIEW SIZE UPDATE INDEX STILL TIME REVEAL I/II PIP PR- PIP PR+ SWAP PIP INPUT M/C EJECT SLEEP Remote Control handset Owner’s Manual 2-Eye Bolts 1.5V Power Cord Alkaline batteries 2-Wall brackets Joining the set assembly to the wall to prevent the set tumbling - Secure the set assembly by fixing it to a wall by using the Eye Bolts/Wall brackets.

  • Page 8: Specifications

    50 inch wide Color Display Module Aspect Ratio 16:9 PDP Module PDP50X3####, RGB Closed Type Screen Filter 45% Total light transmittance (E-Mash) Maker : NBK/ Mitsui/ LG Chemical Operating Environment 1)Temp. : 0~40deg LGE SPEC. 2)Humidity : 0~85% Storage Environment 3)Temp. : -20~60deg...
  • Page 9 2) Model General Specification Item Specification Remark Market The United Kingdom Broadcasting system 1) PAL-BG/DK/I 2) SECAM L/L’ 4)DVB-T(ID TV) Receiving system Analog : Upper Heterodyne Digital : COFDM Scart Jack (3EA) PAL, SECAM Video (2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60 S-Video Input (2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60...

  • 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 is applied all of the 42”, 50” PDP TV, DF- your connection in Communication dialog. (If your 054B Chassis. connection is ‘NG’, then set your PORT(COM1,2,3,...) correctly.) 2.

  • Page 11: Adjustment Method

    4. Sub Program Down Load (2) Vs Adjustment 1) Connect + terminal of D.M.M to Vs pin of P807, connect 1) Select “ PDP” and “Hurricane” on Model dialog. and check – terminal to GND pin of P807. your connection in Communication dialog. (If your 2) After turning RV401, voltage of D.M.M adjustment as connection is ‘NG’, then set your PORT(COM1,2,3,...) same as Va voltage which on label of panel right/top.
  • Page 12 8-2. Required Equipment 1) Remote controller for adjustment 2) AV Pattern Generator : 802F Pattern Generator, Master(MSPG-925FA), etc (Which has PAL Composite Video format output with standard(1.0 Vpp) Vertical 100% Color Bar Pattern as Fig7) 8-3. Method of Auto AV(CVBS) Color Balance 1) Input the PAL Composite Video into video input.
  • Page 13 15 minutes. 2) As below Fig.9, Supply 216Level (85 IRE) full screen pattern to Video input. 9-2. Required Test Equipment (Input 50Hz, 42PX5D/50PX4D : AV4/AV5 Input) 1) Remote controller for adjustment COL OR 2) 802F Pattern Generator A N A L YZER (Which has 720p Ypbpr output with Standard(0.7Vpp)
  • Page 14 11-3. Method of Auto RGB Color Balance 1) Input the PC 1024x768 60Hz 100%Color bar into RGB. 2) Set the PSM to Standard mode in Picture menu. 3) Press ADJ key on R/C for adjustment. 4) Press the (Vol. +) key operate To set, then it becomes automatically.

  • Page 15: 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 16 1-2. Sony Power Board Structure T502: Vs Trans T702: Va Trans T101: St-by Trans T103: Low Voltage Trans - 16 -...
  • Page 17 1-3. Sanken, LGIT Power Board Structure T221: Vs Trans T271: Va Trans T121: St-by Trans T201: Low Voltage Trans - 17 -...
  • Page 18 2. No Power (1) Symptom It is not discharged minutely from the module. fl Light 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.
  • Page 19 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 20 4. No Raster (1) Symptom It does not discharged from the 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 Power normal? voltage except Stand-by 5V? Board.
  • Page 21 5. In the 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 22 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 23 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. Does IC400 Does IC401 Does IC402...

  • Page 24: Printed Circuit Diagram

    PRINTED CIRCUIT BOARD MAIN(TOP) - 24 -...
  • Page 25 MAIN(BOTTOM) - 25 -...
  • Page 26 DIGITAL(TOP) SIDE A/V(TOP, BOTTOM) - 26 -...
  • Page 27 DIGITAL (BOTTOM) CONTROL(TOP) CONTROL(BOTTOM) - 27 -...
  • Page 28 EPF (TOP) EPF (BOTTOM) LED (TOP) LED (BOTTOM) - 28 -...

  • Page 29: Block Diagram

    BLOCK DIAGRAM - 29 -...

  • Page 30: Exploded View

    EXPLODED VIEW - 30 -...

  • Page 31: Exploded View Parts List

    POWER SUPPLY ASSEMBLY, PDP 50INCH AF05GA 480W 1H259W SANKEN 50 INCH LOW END PSU 6871VSMG97A PWB(PCB) ASSEMBLY,SUB DF054B 50PX4D-EB SIDE A/V MANUAL 4811V00168G BRACKET ASSEMBLYSIDE AV 50PX4R-TB SKD 6500VR0002A SENSOR, YGCA-T068A LG INNOTEK AMBIENT LIGHT DIGITAL EYE SENSOR ASSY - 31 -...

  • Page 32: Replacement Parts List

    MIC39100 3P SOT223 R/TP LDO TYPE 2.5V IC802 0IMMR00024A 24LC256T-I/SMG(PB FREE) MICRO IC1102 0IPMG00027A SC156515M-1.8TR 5P/TO-263-5 R/TP 1.5A 692791029AB IC900 SOFT WARE, 2.00V 752C PDP DF054B 50PX4D-EB IC1103 0IPMGKE030A KIA78R05F KEC 5PIN DPAK R/TP 1A,5V IC901 0IMMR00002A K4D261638F-LC50,LF TSOPII 66P 0IPMG00027A IC1104 SC156515M-1.8TR SEMTECH 5P/TO-263-5...
  • Page 33 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 34 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 35 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 36 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 37 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 38 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION L1026 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP L1027 6210VC0006A 0DL233309AC SAM2333 TP GREEN:10MCD, RED:6MCD 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP D1003 L103 D1101 0DL233309AC SAM2333 TP GREEN:10MCD, RED:6MCD L104 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP...
  • Page 39 FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP L300 ACCESSORIES L301 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP L301 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP 3828VA0578A MANUAL, 50PX4D LG EN 141R TX MLB-201209-1000L-N2 R/TP 1000OHM 350MA L302 6200JB8010L 6710V00141W REMOTE CONTROLLER,FILTER GLASS, EPF 6210VC0006A FBMH3216 HM501NT 3.2X1.6X1.6MM R/TP L303 6410VBH003C...
  • Page 44 Jun., 2005 P/NO : 3828VD0221E Printed in Korea...

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