LG 47LA643V (CHASSIS:LD31B) Service Manual ▷ View online
Standard Repair Process Detail Technical Manual
Power Board voltage measuring method
A. Video error_No video/ Audio
A4
Established
date
Revised
date
Error
symptom
Content
LCD TV
Check the DC 24V, 12V, 3.5V.
18 Pin
(Power Board ↔ Main Board) - Common
1
Power on
2
DRV ON
3
3.5V
4
PDIM#1
5
3.5V
6
PDIM#2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
Edge LED
2013. 01 .09
MENU => Press red key Remote controller=>signal test
=> Select channel
=> Select channel
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
attenuator (-10dB, -15dB, -20dB etc.)
Standard Repair Process Detail Technical Manual
TUNER input signal strength checking method
A. Video error_Video error, video lag/stop
<ALL MODELS>
A5
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Standard Repair Process Detail Technical Manual
LCD-TV Version checking method
A. Video error_Video error, video lag/stop
1. Checking method for remote controller for adjustment
Press the IN-START with the remote
controller for adjustment
controller for adjustment
Version
<ALL MODELS>
A6
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Standard Repair Process Detail Technical Manual
LCD TV connection diagram (1)
A. Video error _Vertical/Horizontal bar, residual
image, light spot
As the part connecting to the external input, check the
screen condition by signal
screen condition by signal
A7
Established
date
Revised
date
Error
symptom
Content
LCD TV
<ALL MODELS>
2013. 01 .09
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