LG 55UF6790 Service Manual page 81

Contents of LCD TV Standard Repair Process Detail Technical Manual
No. Error symptom
1
A. Video error_ No video/Normal
audio
2
4
A. Video error_ video error /Video
lag/stop
5
6
A. Video error _Vertical/Horizontal bar,
7
residual image, light spot
8
A. Video error_ Color error
9
10
11
<Appendix>
12 Defected Type caused by T-Con/
Inverter/ Module
13
14
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
Content
Check LCD back light with naked eye
Check White Balance value
TUNER input signal strength checking
method
LCD-TV Version checking method
Tuner Checking Part
LCD TV connection diagram
Check Link Cable (EPI) reconnection
condition
Adjustment Test pattern - ADJ Key
Exchange Main Board (1)
Exchange Main Board (2)
Exchange Power Board (PSU)
Exchange Module (1)
Exchange Module (2)
Page Remarks
A1
A2
A3
A4
A5
A6
A7
A8
A-1/5
A-2/5
A-3/5
A-4/5
A-5/5
LGE Internal Use Only