LG 42PW340 Service Manual

Chassis : pu11a

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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 : PU11A MODEL : 42PW340 42PW340-UB 42PW350 42PW350-UA/UE 42PW350U 42PW350U-UC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea...
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
Safety : UL1492, USA C22.2 No. 1 42PW350-UA/UE North America / Canada / Maxico EMC : FCC Class B, IC Class B 42PW350U-UC Copyright ©2011 LG Electronics Inc. All rights reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
Page 5 2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : ~ 85 % Copyright ©2011 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Adjustment Instruction
(1) EDID (The Extended Display Identification Data ) (2) Color Temperature (White Balance) Adjustment (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 RGB 1080p adjustment in RGB input mode If you success RGB 1080p Adjust. You can see “ADC RGB-DTV Success” Copyright ©2011 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8 EDID DATA (Model name = LG TV) - RGB EDID table(3D HD) US (PCM) - HDMI1 EDID table(3D HD) US(PCM) Copyright ©2011 LG Electronics Inc. All rights reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 1) Using Inner Pattern - HDMI3 EDID table(3D HD) US(AC3) 2) Using HDMI input < Connection Diagram for Adjustment White balance > Copyright ©2011 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 * If it needs, offset adjustment (wb 00 20-start, wb 00 2f- end) “wb 00 ff”: End of white balance adjustment (inner pattern disappear) Copyright ©2011 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 < fig.1 : 42 inch Power PCB Assy Voltage adjustment > function inspection Caution : Inspection only PAL M / NTSC Copyright ©2011 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12 - DO NOT REMOVE USB MEMORY CARD FROM USB PORT WHEN YOU FIND BELOW DESCRIPTION - " Do not remove the memory card from the port! " Copyright ©2011 LG Electronics Inc. All rights reserved. - 12 - LGE Internal Use Only...
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 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 Last updated 2010.10.18...
Page 30 UART UART UART TMDS/DDC HDMI 1 HDMI TMDS/DDC HDMI 2 TMDS/DDC Rear USB( SVC only ) HDMI 3 USB2.0 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 Demodulator Active High (Main Soc) Active Low GPIO Reset 3DF Reset Active Low GPIO Reset RF emitter Active Low Reset 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 1 us tON_IODDR DDR power on time after I/O power on 201us tON_IODDR DDR power on time after Core power on 201us Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 +3.3V Touch Touch (F15) <SUB_SCL> I2S_IN_WS/GPIO74 Assy Assy GPIO36/UART3_RX (K21) <3D_RF_RXD> +3.3V RF emitter RF emitter (L23) GPIO37/UART3_TX <3D_RF_TXD> Assy Assy Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 Serial Serial NAND NAND VDD33_DVI IC900 IC900 IC109 IC109 VDD33_3.3 MAX3232 MAX3232 NVRAM NVRAM AU33_3.3 IC102 IC102 Reset FRC_LPLL_3.3 HDCP HDCP Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 40 Analog TV Audio Trouble Shooting Component / RGB / AV Audio Trouble Shooting HDMI Audio Trouble Shooting USB Trouble Shooting 3D Trouble Shooting Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 PM GPIO at IC103 problem Check signal transition Maybe NAND Flash Memory or S7R 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 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Electrical Specifications 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 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Replace X-TAL (X602) Check TP Clock, Data, Sync Maybe Demodulator has problems R630, R631, R632 , R633 Maybe MstarS7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 51 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 R1074/R1073/R1076 R1074/R1073/R1076 R1001/R1004/R1067 R1001/R1004/R1067 & Recheck Check Component Signal Replace it R173/R175/R177 R180/R182/R184 Maybe Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 R163/R164 Check Sync Signal & Recheck Replace it or re-burn Check EEPROM (IC901) & Recheck Maybe Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 55 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 R1003/R1044 R1003/R1044 & Recheck Replace one of Check CVBS Signal R187/R188/C226/C227 R187/R188/C226/C227 & Recheck Maybe Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 57 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 JK801, JK803, JK804 Check I2C Signal Replace It & Recheck R829/R830 /R848/R849/R862/R863 Maybe Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 L511, L509 Check Mstar S7R I2S Output Replace It & Recheck R711, R712, R713, R714 Maybe Mstar S7R(IC101) has problems Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 61 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Maybe Mster S7R internal audio Follow procedure All source audio DSP has problems. trouble shooting Replace It Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Follow procedure All source audio problems. trouble shooting 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 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 Maybe Mstar S7R audio block has Follow procedure All source audio problems. trouble shooting Replace It Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 67 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 IC801, IC802, IC804 Maybe Mstar S7R audio block has Follow procedure All source audio problems. trouble shooting Replace it Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 69 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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...
Page 71 COMP2_LR RGB_LR EXT_IN (Comp1/2, RGB) (USB) HDMI_Rear(D port) SIDE HDMI_PORT Rear USB( SVC only ) 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 72 Check S7R Main chip and Soc_Reset at R1464 Maybe LG8300(IC1400) Check P1404 has troubles #5(High), #11(High), #12(60Hz) Check RF emitter board or 3D glass Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

This manual is also suitable for:

42pw340-ub 42pw350 42pw350-ua 42pw350u 42pw350-ue 42pw350u-uc

LG 42PW340 Service Manual

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Summary of Contents for LG 42PW340

Page 2: Table Of Contents

Page 3: Safety Precautions

Page 4: Specification

Page 6: Adjustment Instruction

Page 13: Block Diagram

Page 14: Exploded View

This manual is also suitable for: