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42PJ350C

LG 42PJ350C Training Manual

132 pages

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Advanced Single Scan Troubleshooting

42" Class HD 720p Plasma TV

(41.6" diagonally)

Training Manual

42PJ350 Plasma Display

Published August 12

, 2010

Overview of Topics to be Discussed2
Troubleshooting2
LG Contact Information4
Important Safety Notice5
ESD Notice6
Regulatory Information6
Basic Troubleshooting Steps8
42Pj350 Product Information Section9
600Hz Sub Field Driving14
42PJ350 Remote Control15
Disassembly Section18
Circuit Board Layout20
Left and Right X Drive Connector Removal26
Left and Right X Drive Removal28
Circuit Operation, Troubleshooting and Circuit Alignment Section29
Adjustment Notice32
Switch Mode Power Supply Section33
Power Supply Basic Operation37
Power Supply38
Power Supply Static Test (Forcing on the SMPS in Stages)41
SMPS Connector P813 Identification, Voltages and Diode Check42
Y - Sus Board Section44
Y - SUS Block Diagram45
Y - SUS Board Layout46
Layout Drawing47
VSC and - VY Adjustments48
Y - Drive Signal Overview49
Locking on to the y - Drive Waveform Tip50
Set up or down Adjustment Extremes53
Y - SUS P211 Connector Diode Mode Testing57
Y - SUS Floating Ground (FG 15V) and (FG 5V) Checks58
Y - SUS 18V Generation Checks59
Y - SUS Fuse Information60
Y - SUS P209 Plug Information62
Y - Drive Board Section64
Y - Drive Layout66
Y - Drive Diode Check Scan and FG67
Y - Drive Buffer Troubleshooting68
Incorrectly Seated y - Drive Flexible Ribbon Cables70
Y - Drive P106 Connector Diode Mode Testing73
Z - Sus Section74
Operating Voltages74
Z - SUS Block Diagram75
Z - SUS Board Component Identification76
Z - SUS Waveform78
Connector P1 to Control P102 Voltages and Diode Checks81
Control Board Section82
Control Board Pictorial83
Control Board Component Identification and Checks84
Locking on to the y - Drive or Z - Drive Waveform Tip86
Control Board Signal (Simplified Block Diagram)88
Control Board LVDS P121 Connector Voltages and Diode Check92
Control Board P102 Connector Pin ID and Voltages93
TCP 3.3V B+ Check102
Main Board Section106
Main Board Plug P703 " LVDS " Voltages116
Audio Amp119
FRONT IR, POWER LED and SOFT TOUCH KEY PAD SECTION120
SOFT TOUCH KEY PAD SECTION (Board Layout and Identification)124
Invisible Speaker System Section127

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Service Manual35 pages

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LG 42PJ350C Specifications

General

Brand	LG
Model	42PJ350C
Category	Plasma TV
Language	English

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Table of Contents

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LG 42PJ350C Specifications

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