LG 55LF5950 Service Manual page 54

Contents of LCD TV Standard Repair Process Detail Technical Manual
No. Error symptom
1
2
A. Video error_ No video/Normal audio
3
4
6
A. Video error_ No video/Video lag/stop
7
9
10
A. Video error_Color error
11
12
13
A. Video error_Vertical/Horizontal bar,
14
residual image, light spot
15
16
17
<Appendix>
Defected Type caused by T-Con/ Inverter/
18
Module
19
20
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
Content
Check LCD back light with naked eye
LED driver B+ 24V measuring method
Check White Balance value
Power Board voltage measuring method
TUNER input signal strength checking method
LCD-TV Version checking method
LCD TV connection diagram
Tuner Checking Part
Check Link Cable (LVDS/EPI) reconnection
condition
Adjustment Test pattern - ADJ Key
LCD TV connection diagram
Check Link Cable (LVDS/EPI) reconnection
condition
Adjustment Test pattern - ADJ Key
Exchange T-Con Board (1)
Exchange T-Con Board (2)
Exchange LED driver Board (PSU)
Exchange Module itself (1)
Exchange Module itself (2)
Page Remarks
A1
A4
A5
A6
A7
A8
A9
A12
A8
A12
A-1/5
A-2/5
A-3/5
A-4/5
A-5/5
LGE Internal Use Only