LG LB87 series Service Manual

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 Power Board voltage measuring method A4
6
A. Video error_ No video/Video lag/stop
TUNER input signal strength checking method A6
7 LCD-TV Version checking method A7
9
A. Video error_Color error
LCD TV connection diagram A8
11
Check Link Cable (LVDS) reconnection
condition
A10
12 Adjustment Test pattern - ADJ Key A12
13
A. Video error_Vertical/Horizontal bar,
residual image, light spot
LCD TV connection diagram A8
14
Check Link Cable (LVDS) reconnection
condition
A10
A11
15 Adjustment Test pattern - ADJ Key A12
16
<Appendix>
Defected Type caused by Main/ Inverter/
Module
Exchange Main Board or EPI Cable
A-
1/5
17 Exchange Main Board or EPI Cable
A-
2/5
18 Exchange LED driver Board (PSU)
A-
3/5
19 Exchange Module itself (1)
A-
4/5
20 Exchange Module itself (2)
A-
5/5
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LG LB87 series Specifications

General

Brand	LG
Model	LB87 series
Category	LED TV
Language	English