LG 65LA9650-UA (CHASSIS:LA34N) Service Manual ▷ View online
Interconnection - 1
XXLA9700-NA
[PCBs]
7
7
1
Main PCB
2
PSU
1
7
7
3
WIFI ASSY
4
BT MOTION ASSY
1
2
6
5
IR PCB
6
Local Key
5
3
4
7
LED Driver
5
Interconnection – sub PCB( XXLA9700 Series )
Sliding SPK control PCB Assy
Sliding SPK control PCB Assy
3
4
BT MOTION ASSY
5
IR Key PCB
WIFI ASSY
Sliding SPK unit
Local Key
Local Key
PCB
IR PCB
WIFI ASSY
BT MOTION ASSY
To Main
1
To Main
Contents of LCD TV Standard Repair Process
No.
Error symptom (High category)
Error symptom (Mid category)
Page
Remarks
1
No video/Normal audio
1
2
No video/No audio
2
A. Video error
3
Picture broken/ Freezing
3
4
Color error
4
Vertical/Horizontal bar residual image
5
Vertical/Horizontal bar, residual image,
light spot, external device color error
light spot, external device color error
5
6
B Power error
No power
6
Off
h
ff
hil
i
i
B. Power error
7
Off when on, off while viewing, power
auto on/off
auto on/off
7
8
C. Audio error
No audio/Normal video
8
9
Wrecked audio/discontinuation/noise
9
10
Remote control & Local switch checking
10
MR13
i
h
ki
11
D. Function error
MR13 operating checking
11
11
12
Wifi operating checking
12
13
Camera operating checking
13
13
Camera operating checking
13
14
External device recognition error
14
15
E. Noise
Circuit noise, mechanical noise
15
16
F. Exterior error
Exterior defect
16
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
Established
date
Standard Repair Process
Revised date
1/16
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
2013.01.31
Revised date
1/16
No video/ Normal audio
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
Normal
audio
Y
No video
Normal audio
Normal audio
Check Back Light
On with naked eye
On with naked eye
On
Y
Check Power
Board
24V, 12V,3.5V etc.
Board
24V, 12V,3.5V etc.
Normal
voltage
Y
Replace T-con/FRC
Board or module
And Adjust VCOM
Board or module
And Adjust VCOM
☞
A18
☞
A1
N
Move to No
video/No audio
video/No audio
N
N
Repair Power
Board or parts
Board or parts
Check Power Board 24V output
☞
A18
Normal
voltage
voltage
Y
Replace Inverter
or module
or module
N
End
Repair Power
Board or parts
Board or parts
Always check & record S/W Version and White
※
Precaution
☞
A4 & A2
Always check & record S/W Version and White
Balance value before replacing the Main Board
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
1
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