LG 42PT330 Service Manual

Chassis : pu14k

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PLASMA TV

SERVICE MANUAL

CHASSIS : PU14K

MODEL : 42PT330/350/350C

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL67002603(1106-REV01)

42PT330-UB/42PT350-UD/

42PT350C-UD

North/Latin America

Europe/Africa

Asia/Oceania

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

Printed in Korea

Table of Contents

Summary of Contents for LG 42PT330

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 : PU14K MODEL : 42PT330/350/350C 42PT330-UB/42PT350-UD/ 42PT350C-UD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea P/NO : MFL67002603(1106-REV01)
Page 2: Table Of Contents
CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................7 BLOCK DIAGRAM ........................12 EXPLODED VIEW ........................13 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
Remark 42PT330-UB Safety : UL1492, CSA C22.2.No.1 42PT350-UD NORTH AMERICA EMC : FCC Class B, IC Class B 42PT350C-UD 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 deg ~ 60 deg 2) Humidity : 0 % ~ 85 % Copyright ©2011 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6 Meduum:Color temperature 0 0.314 0.329 0.344 Warm:Color temperature W30 - 85IRE(216Gray) 100% Window Brightness uniformity White Pattern - Picture: Vivid(Medium) Copyright ©2011 LG Electronics Inc. All rights reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7: Adjustment Instruction
- POWER PCB Ass’y Voltage adjustment - Adjustment of White Balance - RS-232C - OPTION - Outgoing condition Configuration - Internal pressure Copyright ©2011 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8 (1) After enter Service Mode by pushing “ADJ” key, select “4. EDID D/L”. (2) Finally execute “START” by pushing “ ” or “ ”key. Copyright ©2011 LG Electronics Inc. All rights reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 Inside PATTERN is used when W/B is controlled. Connect to auto controller or push control R/C ADJ Key‡ Enter the mode of White-Balance, the pattern will come out. Copyright ©2011 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only...
Page 10 - R-offset / G-offset / B-offset is set to 128 - Control G-Gain and B-Gain. - Each gain is limited to 192 Copyright ©2011 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 Confirm whether is normal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for one second 13. Default Service option. Copyright ©2011 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 13: 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 24 Mstar L Mic L EEPROM Mixer HDMI3 TLV320A JACK PACK JACK PACK Option at SIDE at SIDE DP/DM Option USB2.0/DivX O.C. Protector Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 25 Audio L1011 3.3V_AMP_AVDD IC804 <Mstar Power Sequence> 5V_USB MIC2009YM6 EEPROM (HDMI) HDMI switch IC306 IC307 3.3V_TU 1.8V_TU AZ1117H Tuner AZ1117H 5V_TU_CVBS Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 26 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 27 Voltage Level (3.3V) Check C311 Replace Q302 Voltage Level 5V Check IC303 (pin2) Replace IC303 Voltage Level 3.3V Check IC203 Flash Memory Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 28 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 Check CAS Input Signal Timing Specification Refer to Module CAS 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 30 SDA (continue) Command Data Stop for Addr By Slave By Master By Slave Master : VSC(Image) Board Slave : PDP Module Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 32 Check P701 or P703 Replace Mstar(IC1) has problems #21(RA2+) , #22(RA2-) , #19(RB2+) , #20(RB2-) Check PDP Module Control board Refer to Module CAS Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 34 Check CVBS signal Replace Tuner(IC401) IC401 #16 Pin Replace Mstar(IC1) < CVBS 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 35 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 Check signal And Replace Connector C25, C26, C27, C44,C46,C47 Replace IC1 Replace Mstar(IC1) ※ Measured signals depend on the input signal. Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 R58, R59, R60 Check Signal Replace C14, C16, C17. C14, C16, C17 ※ Measured signals depend on the input signal. Replace Mstar(IC1) Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 40 Check signal R30 (Rear AV) (Rear) Replace Resistor R29 (Side AV) Replace Mstar(IC1) ※ Measured signals depend on the input signal. Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 Power(#8) & I2C Signal (#5, #6) Check HDCP (IC501) Replace IC501 Power(#8) & I2C Signal (#5, #6) Replace Mstar(IC1) Check Mstar(IC1) Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 44 :They must be High (3.3V) Check Signal (PWM) Replace L803, L804. L803, L804 Check Connector Replace JK801 JK801 Check speaker for damage. Replace the Speaker Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 Follow procedure digital TV video Check video output trouble shooting Follow procedure All source audio trouble Replace Mstar IC (IC1) shooting Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 Follow procedure All source audio trouble < SIF waveform – sample > shooting - Defend on the input signal. Replace Mstar IC (IC1) Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 R616 / R618 (AV Rear) R633 / R634 (AV Side) Check IC1 signal C20,C21,C22,C23,C28, Replace Capacitor C29,C33,C34,C12,C13 Follow procedure All source audio trouble shooting Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 51 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 52 Check EDID EEPROM (IC502, 503, 504) Replace IC or re-download EDID data. Power(#8) & I2C Signal (#5, #6) Follow procedure All source audio trouble shooting Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 54 Check SPDIF signal (R641) Check Signal (JK604 #3) Replace JK604 < SPDIF 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 55 AV2 / L/R Analog RGB L/R Audio Analog (6input) COMP1 L/R Audio COMP2 L/R (3output) SPDIF GPIO Optical output TAS5709 TAS5709 Video Audio Copyright © 2011 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 56 - 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...

This manual is also suitable for:

42pt350 42pt350c 42pt330-ub 42pt350-ud 42pt350c-ud

LG 42PT330 Service Manual

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Summary of Contents for LG 42PT330

Page 2: Table Of Contents

Page 3: Safety Precautions

Page 4: Specification

Page 7: Adjustment Instruction

Page 12: Block Diagram

Page 13: Exploded View

This manual is also suitable for: