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LG
LED TV
42LB65 Series
Service Manual
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LG 42LB65 Series - Page 83
94 pages
Manual
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Abnormal
Power Section
Solder defect, Short/Crack
Abnormal
Power Section
Solder defect, Short/Crack
Fuse Open,
Abnormal power
section
Noise
GRADA
TION
GRADA
TION
Abnormal
Display
A
ppendix
: Exchang
e EPI Cable or Main B/D (2)
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
82
84
Table of Contents
Main Page
Table of Contents
2
Leakage Current Hot Check Circuit
3
Safety Precautions
3
Leakage Current Hot Check
3
General Guidance
3
General Servicing Precautions
4
Electrostatically Sensitive (ES) Devices
4
General Soldering Guidelines
4
Servicing Precautions
4
IC Remove/Replacement
5
"Small-Signal" Discrete Transistor Removal/Replacement
5
Power Output, Transistor Device Removal/Replacement
5
Diode Removal/Replacement
5
Test Method
6
Requirement for Test
6
Application Range
6
Specification
6
Component Video Input
8
HDMI Input
9
DTV Mode
9
PC Mode
9
Mode
10
HDMI 1.4B
10
HDMI Input(1.3)
11
RF Input(3D Supported Mode Manually)
11
RF Input (3D Supported Mode Automatically)
11
USB, DLNA (Movie) Input (3D Supported Mode Manually)
11
3D Input Mode
12
HDMI-PC Input (3D Supported Mode Manually)
12
Miracast, Widi (3D Supported Mode Manually)
12
Component Input(3D) (3D Supported Mode Manually)
12
Designation
13
Automatic Adjustment
13
LAN Inspection
13
Adjustment Instruction
13
Lan Port Inspection(Ping Test)
14
Equipment Setting
14
CI+ Key Checking Method
14
Wifi Mac Address Check
15
Manual Adjustment
15
Edid Data
15
3D Edid
15
Adj. Command (Protocol)
16
White Balance Adjustment
16
Equipment Connection MAP
16
Local Dimming Function Check
17
LED White Balance Table
17
Color Temperature
17
Magic Motion Remote Control Test
18
3D Function Test(Except Non-3D Product)
18
Wi-Fi Test
18
LNB Voltage and 22Khz Tone Check
19
Option Selection Per Country
19
Tool Option Selection
19
GND and Internal Pressure Check
19
USB S/W Download(Service Only)
20
Block Diagram
21
Exploded View
22
System Configuration
23
Place at Jack Side
25
Renesas MICOM
31
Lvds
48
Local Dimming
49
V14-Lgd Panel
50
Emmc I/F
51
Ir Blaster
52
RS-232C Control INTERFACE
53
Contents of LCD TV Standard Repair Process
57
No Video/ Normal Audio
58
Video Error
58
Standard Repair Process
58
No Video/ no Audio
59
Picture Problem
60
Picture Broken/ Freezing
60
Color Error
61
Vertical / Horizontal Bar, Residual Image, Light Spot, External Device Color Error
62
Power Error
63
No Power
63
Off When On, off While Viewing, Power Auto On/Off
64
No Audio/ Normal Video
65
Wrecked Audio/ Discontinuation/Noise
66
General Function Problem
67
Remote Control & Local Switch Checking
67
Function Error
68
External Device Recognition Error
68
Noise
69
Circuit Noise, Mechanical Noise
69
Exterior Defect
70
Contents of LCD TV Standard Repair Process Detail Technical Manual
71
Standard Repair Process Detail Technical Manual
73
Check LCD Back Light with Naked Eye
73
LED Driver B+ 24V Measuring Method
74
Check White Balance Value
75
Power Board Voltage Measuring Method
76
TUNER Input Signal Strength Checking Method
77
LCD-TV Version Checking Method
78
LCD TV Connection Diagram
79
Check Link Cable (EPI) Reconnection Condition
80
Adjustment Test Pattern - ADJ Key
81
Exchange EPI Cable or Main B/D
82
Exchange Power Board
84
Exchange the Module
85
Check Front Display LED
87
Check Power Input Voltage and ST-BY 3.5V
88
Checking Method When Power Is on
89
POWER off MODE Checking Method
90
Checking Method in Menu When There Is no Audio
91
Voltage and Speaker Checking Method When There Is no Audio
92
Remote Controller Operation Checking Method
93
V-Com Checking and Adjust Method
94
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