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LG 50PX950-AA Service Manual
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LG 50PX950-AA Service Manual

LG 50PX950-AA Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : PA02B
MODEL : 50PX950
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL63289209(1008-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
50PX950-AA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 50PX950-AA

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com PLASMA TV SERVICE MANUAL CHASSIS : PA02B MODEL : 50PX950 50PX950-AA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea P/NO : MFL63289209(1008-REV00)

  • Page 2: Table Of Contents

    CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................6 BLOCK DIAGRAM........................11 EXPLODED VIEW ........................12 SVC. SHEET ..........................Copyright ©2010 LG Electronics Inc. All rights reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright ©2010 LG Electronics Inc. All rights reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specification

    4) Humidity : 10 % ~ 90 % Input Voltage AC 100 V ~ 240 V, 50 / 60 Hz Maker LG Copyright ©2010 LG Electronics Inc. All rights reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 For SVC, S/W Download, X-Studio, DivX Bluetooth Bluetooth Phone(JPEG, MP3), Profile : A2DP,BIP,FTP,GAVDP,HSP, OPP Bluetooth Headset(mono, stereo) Only 50/60PK*50R-TA Ethernet LAN Copyright ©2010 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instruction

    TV and PC. (2) Click (4) to download MAC Address. (3) When download succeed, you can see “OK” on (6) Copyright ©2010 LG Electronics Inc. All rights reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 Name Value 1 Value 2 Value 3 Value 4 Value 5 50PX950-AA 37536 31831 54920 24940 2866 60PX950-AA 49824 Copyright ©2010 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 2) After turning VR901,voltage of D.M.M adjustment as same as Va voltage which on label of panel right/top (deviation; ±0.5V) Copyright ©2010 LG Electronics Inc. All rights reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 (1) Connect LAN cable from Computer to TV Set (2) When network operates normally, you can see “OK” on Computer Copyright ©2010 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 (1) Push the menu button in DTV mode. (2) Check the Serial Number Select the STATION -> Diagnostics -> To set Copyright ©2010 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Block Diagram

    BLOCK DIAGRAM Copyright ©2010 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...

  • Page 12: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 12 - LGE Internal Use Only Copyright ©2010 LG Electronics Inc. All rights reserved. Only for training and service purposes...
  • Page 13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. BCM GPIO/NEC MICOM/FLASH/SYS EEPROM Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 14 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. BCM AUDIO/LVDS Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 15 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. BCM VIDEO IN/BCM POWER Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 16 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR2 MEMORY INTERFACE Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 17 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SMPS POWER Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 18 EAX61354901 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 19 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. AUDIO AMP Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 20 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI UX/HDMI Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 21 EAX61354901 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS/RS232//RGB Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 22 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. EAX61354901 JACK Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 23 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR USB HUB THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 24 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR ETHERNET THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2010 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 26 Great Company Great People 3DTV (PA02B) Training manual 3DTV (PA02B) Training manual Contents - Block Diagram - Power Flow Diagram - Trouble Shooting Guide PDP DVB Gr. JANG EUN KWANG 2010.8.13...
  • Page 27 Trouble Shooting Guide for LG Service Man Trouble Shooting Guide for LG Service Man 5/37...
  • Page 28 Y Board ASIC Main X board Emitter 50PX950-AA model block diagram 50PX950-AA model image Changed Point 1. Add 3D formatter board (3DF) - 3DF board received LVDS data and make L/R image for 3D - Main to 3DF cable : 51pin FFC / 3DF to ASIC cable : 80pin FFC 2.
  • Page 29 Block Diagram - Overview RF Jack RF Jack X-tal NAND Half-NIM DDR(1GBit)x4 (54MHz) Flash(4G) 8Bits 8Bits Buffer Buffer 3D_SYNC_OUT TV_CVBS AV1/2 3D SYNC_IR EMITTER Component1/2 SYSTEM SYSTEM CVBS/L/R EEPROM EEPROM Y/Cb/Cr/L/R MCLK TAS5709 (Digital AMP) BCM3556 R/G/B, H/V Sync X-tal HDMI CEC RGB-PC (10MHz)
  • Page 30 Main board (GP2 modify) Motion Remocon PC Audio Power 18pin SPDIF Center LED 3pin Rear AV IR emitter assy - front Component LVDS Side AV BCM3556CP IR/Control IR emitter assy - back HDMI HDMI Speaker 4pin RS232 HDMI wireless Tuner HDMI HDMI IR emitter 4pin...
  • Page 31 3D Formatter Board (3DF) 2D to 3D D/L wafer 3D D/L wafer 2D to 3D chip FPGA FPGA 2D to 3D 3D chip 3D formatter board image 3D formatter board layout 3D function 3DF board Module 2D to 3D 3D Source chip (ASIC) chip...
  • Page 32 Block Diagram – 3DF B/D (PDP 3DTV) 5V_VCC X-tal PROM X-tal PROM (54MHz) (16Mbit) (54MHz) (16Mbit) 5V_VCC 3D_SYNC 3D_SYNC LVDS 2Ch (Left) 2D to 3D 3D Formatter L/R DETECT L/R DETECT Converter (FPGA) FPGA RESET FPGA RESET FPGA RESET (FPGA) EP3C55F484 LVDS 2Ch LVDS 2Ch...
  • Page 33 Changes List : Module To improve 3D Crosstalk, change R/G fluorescent substance (Afterglow time 10㎳ 4㎳ ) New ASIC for 3D (A1.0) and apply 3D sustain waveform As is (60R1) To be (60R1X 3D) R1 3D ▶ fluorescent substance ▶ fluorescent substance - Afterglow time: 10ms (R,G) - Afterglow time : 4ms(R,G) ▶...
  • Page 34 Block Diagram – PSU +3.3V_NEC_ST 3.25V 52mV +5V_ST L503 EEPROM(NEC) IC500 L505 +3.3V_ST 52mV (3.3V Reg) 4.98V NEC Micom SPEC : 2A 56mV ※ INSTANT BOOT MAX3232 P906(SUB B/D) INSTANT_BOOT BUZZER 1.83V 80mV D1.8V IC501 D1.8V L1304 DDR2x4 (DCDC) 1.79V 1100mA IC800 +1.8V_HDMI...
  • Page 35 Power Flow Diagram P814 Error_DET STBY STBY RL_ON AC DET M_ON AUTO_GND SMAW200-H18S2 <BCM Power Sequence>...
  • Page 36 PDP TV Repair Process Index - Trouble shooting by worst symptom Symptom (L) Symptom (M) Page Remark No Picture/Sound OK No Picture/No sound Mal-discharge/Noise/dark picture A. Picture Problem Picture broken/Freezing Vertical bar/ Horizontal Bar No Power (Not turn on) B. Power Problem Turn off (Instant, under watching) C.
  • Page 37 Repair Process A. Picture Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom No Picture/Sound OK Revision First of all, Check whether all of cable between board was inserted properly or not. (Main B/D↔ Power B/D, Power B/D↔ Y-sus B/D,Y-Sus B/D ↔Z-Sus B/D,LVDS Cable,Speaker Cable,IR B/D Cable,,,) Check Module pattern Check Check...
  • Page 38 Repair Process A. Picture Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom No Picture/No Sound Revision Check Module pattern Check Check Sound by using “TILT” key Normal Normal Close Sound LVDS Cable on SVC R/C Replace Check Main B/D Vs, Va...
  • Page 39 Repair Process A. Picture Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Mal-discharge/Noise/dark picture Revision Check Picture problem Check CTRL ROM Ver. Type Replace Replace Normal Normal Control board Module type Picture? Picture? Rom Upgrade Mal-discharge Close Close Check...
  • Page 40 Repair Process A. Picture Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Picture broken/Freezing Revision . By using Digital signal level meter . By using Diagnostics menu on OSD Check RF Signal level ( Menu→Press Red Key on R/C→Enter Signal Test) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not.
  • Page 41 Repair Process A. Picture Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Vertical bar/ Horizontal Bar Revision Check Check Module pattern defect type Regular Replace Normal Vertical by using “TILT” key Module Pattern? Line / Bar on SVC R/C 1.Check CTRL B/D ※CTRL B/D: Control board...
  • Page 42 Repair Process B. Power Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom No Power (Not turn on) Revision DC Power on Check Check Repair/Replace Power LED by pressing Power Key Normal Normal IR B/D Power LED R/C IR Operation On Remote control .
  • Page 43 Repair Process B. Power Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Turn off (Instant, under watching) Revision ※ To check Power B/D Protection 1. Check Y-Sus/ Z-Sus Board Instant Turn on after pull out connector Power LED (especially Short or Open) between Power B/D &...
  • Page 44 Repair Process C. Sound Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom No sound/ Sound distortion Revision 1.No sound( If HDMI Input only have no sound, download EDID data) Close Check Check Speaker Apply Normal Normal Normal “Speaker ON/Off”...
  • Page 45 Repair Process D. General Function Problem 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Remote control & Local switch checking Revision 1. Remote controller (R/C) operating error Replace Main B/D Check & Repair Check R/C itself Normal Normal Check B+ 5V Normal...
  • Page 46 PDP TV Repair Process Index - Trouble shooting by input block (Component level check) Symptom (L) Input Block Page Remark Power Problem Power-up Boot fail Digital TV Analog TV Component Video Probelm RGB(D-SUB) AV(Scart / CVBS) HDMI All Input Digital TV / HDMI Audio Problem Analog TV Component / AV / RGB...
  • Page 47 전자 - 6-2 Making 2010. 8 . 13 PDP TV Symptom Power-Up Boot Fail 1/15 Revision Check Power connector Check P500 All Replace Power board OK ? Voltage Level (17V, 5V) Check IC503 (pin2) Output Replace IC503 Voltage Level (2.5V) Check L507 Replace L507 Voltage Level 1.2V...
  • Page 48 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Digital TV Video Problem Block 2/15 Revision Check RF Cable Check Voltage Check TU600 Power 5V : IC504 Output 5V(L520), 3.3V(L602), 3V : IC505 Output 1.2V(C618) 1.2V: IC600 Output Check Video color Check Monitor Out Video Replace Tuner...
  • Page 49 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Analog TV Video Problem Block 3/15 Revision Check RF Cable Check 5V voltage Check IC503 Output on TU600(Pin3) Voltage(L520) Check CVBS signal Replace Tuner(TU600) TU600 #11 Pin Replace BCM(IC100) <...
  • Page 50 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Component Video Problem Block 4/15 Revision Check input signal format Is it supported? Check Component Cable Check signal Check the damage of JK1000 on C338,C339,C340 And Replace Connector Replace BCM(IC100) ※...
  • Page 51 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV RGB(D-Sub) Video Problem Block 5/15 Revision Check input signal format Is it supported? Check RGB Cable conductors for damage Check P900 Replace connector (P900). Check signal, Hsync, Vsync Check IC903 Input/Output R953, R959 Check signal Replace C332, C333, C334...
  • Page 52 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV AV Video Problem Block 6/15 Revision Check input signal format Is it supported? Check AV Cable for damage or open conductors Check AV port of JK1002(Side), Replace connector JK1000(Rear) Check signal line JK1002-Video : R359 Replace Resistor or Cap...
  • Page 53 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV HDMI Video Problem Block 7/15 Revision Check input signal format Is it supported? Check HDMI Cable for damage or open conductors Check EDID D/L Re-Download EDID Check JK800 / JK801 / JK802 /JK803 Replace Connector for proper connection or damage Check HDMI Switch Output...
  • Page 54 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV All Input Audio Problem Block 8/15 Revision Make sure you can’t hear any audio Check speaker for damage. Replace the Speaker Check Connector Replace P703 P703 Check IC700 Power Check 17V (P500 #1,2), 17V(L704), 3.3V(L702,L703) 3.3V (IC505 #2)
  • Page 55 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Digital TV / HDMI Audio Problem Block 9/15 Revision ◆ Digital TV Follow procedure digital TV Check video output video trouble shooting Follow procedure All source audio trouble shooting ◆...
  • Page 56 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Analog TV Audio Problem Block 10/15 Revision Follow procedure analog TV Check video output video trouble shooting Check #2 on TU600 for 5V Check IC504 output Voltage Check SIF signal C607 Replace TU600 Check SIF signal (C301) Check SIF line...
  • Page 57 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Component / AV/RGB Audio Problem Block 11/15 Revision Check Connector and cables JK1000 (Component/Rear AV) Replace connector or P900 (RGB) cable if found damaged JK1002 (Side AV) Check signal JK1000 ( Component/Rear AV R1005, R1006...
  • Page 58 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Optical Audio Problem Block 12/15 Revision Check Signal (JK1000 #3) Check 5V #2 on JK1003 Check Q501 Output (L516) Check SPDIF signal (R1051) Replace BCM(IC100) < SPDIF waveform – sample > - Defend on the input signal.
  • Page 59 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV No OSD( or Picture) Problem Block 13/15 Revision Check LED blanking Follow Power-Up Boot Fail When press a key on R/C Check Vs,Va, 5V,17V Replace Power Board on Power Board Check R27/R28 and Check DISP_EN(R253) MICOM...
  • Page 60 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV USB Problem Block 14/15 Revision Check USB 2.0 Cable for damage or open conductors Check P1101/P1102 Replace Connector Check IC1101/1102 #8 status Check USB Module condition Check C1116/C1117 voltage 5V is high ? Replace Capacitor Check R1133,R1134,R1137,R1138...
  • Page 61 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV Bluetooth Problem Block 13/15 Revision Check B/T Version on INSTART MENU Check #10 P1100 is 3.3V Replace Connector Check P1100 Replace Bluetooth Module Check R204, R205 3D mode Problem Change BCM(IC100)
  • Page 62 전자 - 6-2 Making 2010. 8 . 13 Input PDP TV 3D mode Problem Block 13/15 Revision (no Depth , like 2D mode) Change the 3D Glasses Replace 3D Glasses Check 3D Emitter of IR Assy – 1 Check 3D Emitter of Main – P704 1 Replace 3D Emitter Assy pin : 5V pin : 5V...

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