Read LG 55GA7900-UA (CHASSIS:LA37G) Service Manual online
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
Content
Page
Remarks
1
A. Video error_ No video/Normal audio
Check LCD back light with naked eye
A1
2
LED driver B+ 24V measuring method
A2
3
Check White Balance value
A3
4
A. Video error_ No video/Audio
Power Board voltage measuring method
A4
5
A. Video error_ video error /Video
lag/stop
lag/stop
TUNER input signal strength checking method
A6
6
LCD-TV Version checking method
A7
7
Tuner Checking Part
A8
8
A. Video error _Vertical/Horizontal bar,
residual image, light spot
residual image, light spot
LCD TV connection diagram
A9
9
A. Video error_ Color error
Check Link Cable (LVDS) reconnection
condition
condition
A10
10
Adjustment Test pattern - ADJ Key
A12
11
<Appendix>
Defected Type caused by T-Con/
Inverter/ Module
Defected Type caused by T-Con/
Inverter/ Module
Exchange T-Con Board (1)
A-1/5
12
Exchange T-Con Board (2)
A-2/5
13
Exchange LED driver Board (PSU)
A-3/5
14
Exchange Module (1)
A-4/5
15
Exchange Module (2)
A-5/5
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