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42PJ350C
LG 42PJ350C Training Manual
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19
August 2010 42PJ350 Plasma
Removing the Back Cover
Removing the Back Cover
To remove the back cover, remove the 32 screws
Indicated by the arrows.
(The Stand does not need to be removed).
PAY CLOSE ATTENTION TO THE TYPE, SIZE AND LENGTH
Of the screws when replacing the back cover.
Improper type can damage the front.
18
20
Table of Contents
Overview of Topics to be Discussed
2
Troubleshooting
2
LG Contact Information
4
Important Safety Notice
5
ESD Notice
6
Regulatory Information
6
Basic Troubleshooting Steps
8
42Pj350 Product Information Section
9
600Hz Sub Field Driving
14
42PJ350 Remote Control
15
Disassembly Section
18
Circuit Board Layout
20
Left and Right X Drive Connector Removal
26
Left and Right X Drive Removal
28
Circuit Operation, Troubleshooting and Circuit Alignment Section
29
Adjustment Notice
32
Switch Mode Power Supply Section
33
Power Supply Basic Operation
37
Power Supply
38
Power Supply Static Test (Forcing on the SMPS in Stages)
41
SMPS Connector P813 Identification, Voltages and Diode Check
42
Y - Sus Board Section
44
Y - SUS Block Diagram
45
Y - SUS Board Layout
46
Layout Drawing
47
VSC and - VY Adjustments
48
Y - Drive Signal Overview
49
Locking on to the y - Drive Waveform Tip
50
Set up or down Adjustment Extremes
53
Y - SUS P211 Connector Diode Mode Testing
57
Y - SUS Floating Ground (FG 15V) and (FG 5V) Checks
58
Y - SUS 18V Generation Checks
59
Y - SUS Fuse Information
60
Y - SUS P209 Plug Information
62
Y - Drive Board Section
64
Y - Drive Layout
66
Y - Drive Diode Check Scan and FG
67
Y - Drive Buffer Troubleshooting
68
Incorrectly Seated y - Drive Flexible Ribbon Cables
70
Y - Drive P106 Connector Diode Mode Testing
73
Z - Sus Section
74
Operating Voltages
74
Z - SUS Block Diagram
75
Z - SUS Board Component Identification
76
Z - SUS Waveform
78
Connector P1 to Control P102 Voltages and Diode Checks
81
Control Board Section
82
Control Board Pictorial
83
Control Board Component Identification and Checks
84
Locking on to the y - Drive or Z - Drive Waveform Tip
86
Control Board Signal (Simplified Block Diagram)
88
Control Board LVDS P121 Connector Voltages and Diode Check
92
Control Board P102 Connector Pin ID and Voltages
93
TCP 3.3V B+ Check
102
Main Board Section
106
Main Board Plug P703 " LVDS " Voltages
116
Audio Amp
119
FRONT IR, POWER LED and SOFT TOUCH KEY PAD SECTION
120
SOFT TOUCH KEY PAD SECTION (Board Layout and Identification)
124
Invisible Speaker System Section
127
Other manuals for LG 42PJ350C
Owner's Manual
166 pages
Service Manual
35 pages
Manual
12 pages
4
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LG 42PJ350C Specifications
General
Brand
LG
Model
42PJ350C
Category
Plasma TV
Language
English
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