LG 50PT490B Service Manual

Lg plasma tv service manual

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PLASMA TV

SERVICE MANUAL

CHASSIS : PB11K

MODEL : 50PT490B

MODEL :

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL66986913 (1106-REV00)

50PT490B

North/Latin America

Europe/Africa

Asia/Oceania

50PT490B-SA

50PT490B-SD

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 50PT490B

Page 1 North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com PLASMA TV SERVICE MANUAL CHASSIS : PB11K MODEL : 50PT490B 50PT490B-SA MODEL : 50PT490B 50PT490B-SD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea P/NO : MFL66986913 (1106-REV00)
Page 2: Table Of Contents
CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................6 BLOCK DIAGRAM ........................13 EXPLODED VIEW ........................14 SCHEMATIC CIRCUIT DIAGRAM ..................... Copyright ©2011 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 ©2011 LG Electronics Inc. All rights reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Specification
Market Appliance 50PT490B-SA Brazil / chile / Peru / Venezuela/ Costarica / Uruguay Safety : IEC / EN60065 50PT490B-SD Copyright ©2011 LG Electronics Inc. All rights reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
Page 5: General Specification
2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : 0 ~ 90 % Copyright ©2011 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Adjustment Instruction
(2) Color Temperature (White Balance) Adjustment xb 00 90: Endo of Adjustmennt (3) Make sure RS-232C control (4) Selection Factory output option Copyright ©2011 LG Electronics Inc. All rights reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 If you success RGB 1080p Adjust. You can see “ADC RGB-DTV Success” It only needs to PCM EDID D/L for North America Product. (PU11A) Copyright ©2011 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 9 – It is availed communicate with RS-232C : Baud rate: 115200) 3) Video Signal Generator MSPG-925F 720p, 216Gray (Model: 217, Pattern 78) Copyright ©2011 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 Pattern brightness - 100IRE(255Gray) - Picture: Vivid(Medium ) Brightness - 85IRE(216Gray) 100% uniformity Window White Pattern - Picture: Vivid(Medium) Copyright ©2011 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11: Adjustment Method
- ESD test: Test between Power cord GND and Live and neutral. R Cut (4) Leakage current: Set to 0.5mA(rms) G Cut B Cut Copyright ©2011 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12 Press Menu key, and move OPTION 11. Touch Pen Operating check (Pen touch model only) - applied model : 50PT490B / 50PT490E / 60PZ850B (1) Press Pen mode hot key to insert check mode in POWER ONLY condition. (Green Pen mode key on center of remocon) Press “FAV”...
Page 14: Exploded View
EXPLODED VIEW 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 EXPLODED VIEW. 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 15 2010.10.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. S7/FLASH/NVRAM/GPIO Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 16 2010.10.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. NAN: Copyright © 2011 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. Main IC Power S7M_POWER_BLOCK Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 18 EAX63425901(5) ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER Copyright © 2011 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. BRAZIL DEMODULATOR Copyright © 2011 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. AUDIO AMP Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI HDMI Copyright © 2011 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 RGB/RS232/PC/USA IR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SUB IR Copyright © 2011 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 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. CVBS/COM1/2 JACK Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 24 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR SIDE / SVC USB THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 25 EAX63425902(5) 2010.10.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 26 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. KOREA/BRAZIL CAN TUNER LGIT CAN TUNER Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 27 EAX63425902(5) 2010.10.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 29 Great Company Great People GP2-R Training manual GP2-R Training manual Contents - Block Diagram - System Design - Trouble Shooting Guide ATSC Group GP2‐R Team...
Page 30 UART RGB-PC L/R UART TMDS/DDC Rear USB( SVC only) HDMI 1 HDMI TMDS/DDC HDMI 2 USB2.0 TMDS/DDC HDMI 3 Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only) UI_HW_PORT1 HDMI_Side (C port) Side USB UI_HW_PORT1 HDMI_Side (B port) Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 32 GPIO Reset TAS5709 Active Low (AMP) H/W Reset GPIO Reset Active High (Main Soc) Tuner Active Low GPIO Reset Demodulator Active Low Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 3.3V_VDDP (VDDP) Reset (HI Active) 1.5V/1.8V (AVDD_DDR0/1) 1.26V Other Power (AVDD_AU25, 3.3V AVDD_AU33, VDDP AVDD_MEMPLL, AVDD2P5_ADC…etc) 1.5V/1.8V with Other Power Time Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 34 XTAL stable to Reset falling ― ― Reset pulse width ― ― 1.26V to Reset falling ― ― 3.3VDDP to Reset falling ― ― Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 # t3 : Reset Pulse Width : 120ms # t4 : Reset Pulse Width : 400ms # t4 : Reset Pulse Width : 120ms Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 0XA0 0XA0 CH 7 I2S_IN_WS/GPIO174 (F15) <NEC_SCL> +3.3V (F14) <NEC_SDA> I2S_IN_BCK/GPIO175 SUB I2C SUB I2C Touch Eye’ Touch Eye’ 0x70 0x70 Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 DEMOD_RESET Output Demodulator Reset AV_CVBS_DET Input AV_CVBS Auto link COMP2_DET Input Compnent2 Auto link TCON8/CS2 SIDE_CVBS_DET Input SIDE_CVBS Auto link /FLK3 Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 VDD33_3.3 IC901 R202 L901 L314 Emitter board RGB eeprom IC1000 VDD33_3.3 FRC_LPLL_3.3 L316 NAND gate L900 R201 Reset IC900 Optic MAX3232 Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 40 Digital TV Audio Trouble Shooting Analog TV Audio Trouble Shooting Component / RGB / AV Audio Trouble Shooting HDMI Audio Trouble Shooting USB Trouble Shooting Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 Signal from micom GPIO at IC103 problem Check signal transition Maybe NAND Flash Memory or S7 IC104 have troubles Check DDR Memory /Replace one Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 44 Check PDP Module Power Supply Sequence Check CAS Input Signal Timing Specification Control Signal Register It should satisfy the Pixel Clock on CAS. Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 DISPEN rising edge when Power On 1500 6000 msec Time interval between DISPEN falling edge d_off and 90% of Vs when Power Off Recommended 2sec Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 SDA (continue) Command Data Stop for Addr By Slave By Master By Slave Master : Image Board Slave : PDP Module Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 Check Demodulator X-TAL Replace X-TAL (X602) Check TP Clock, Data, Sync Maybe Demodulator has problems R630, R631, R632 Maybe MstarS7(IC100) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 Maybe Tuner(TU1300) has problems TU1300 #11 Pin Replace one of Check CVBS Signal R1330/Q1305/R154/C213 R1334 & Recheck Maybe MstarS7(IC100) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 51 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 52 Check Component Signal R1020/R1021/R1022 R1020/R1021/R1022 R1005/R1012/R1013 R1005/R1012/R1013 & Recheck Check Component Signal Replace it R175/R173/R177 R180/R182/R184 Maybe Mstar S7(IC100) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 54 Replace one of R915/R916 Check Sync Signal & Recheck Replace it or re-burn Check EEPROM (IC901) & Recheck Maybe Mstar S7(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 55 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 56 Check CVBS Signal C1016/C1018 C1016/C1018 & Recheck Replace one of Check CVBS Signal R187/R188/C226/C227 R187/R188/C226/C227 & Recheck Maybe Mstar S7(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 57 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 58 Check HDMI Jack Replace Jack JK803, JK804 Check I2C Signal Replace It & Recheck R844/R845 /R858/R859/R848/R849/R862/R863 Maybe Mstar S7(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 60 Replace It & Recheck L702,L703 Check Mstar S7 I2S Output Replace It & Recheck R724, R725, R726 Maybe Mstar S7(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 61 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 62 Check video output trouble shooting Follow procedure All source audio Maybe Mster S7 internal audio DSP trouble shooting has problems. Replace It Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 64 Maybe Mstar S7 audio block has trouble shooting problems. Replace It < SIF waveform – sample > - Defend on the input signal. Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 65 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 66 C217/C218/C219/C204/R187/R188 C226/C227 C226/C227 & Recheck Follow procedure All source audio Maybe Mstar S7 audio block has trouble shooting problems. Replace It Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 67 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 68 Re-download EDID data Replace IC802, IC804 Follow procedure All source audio Maybe Mstar S7 audio block has trouble shooting problems. Replace it Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 69 24C16 Micom Micom (USB) Local Local HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only PJ230) UI_HW_PORT1 HDMI_Side (C port) Side USB Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 70 - USB power could be disabled by inrushing current - In this case, remove the device and try to reboot the TV (AC power off/on) Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

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LG 50PT490B Service Manual

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