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1. Poor Connection
- Main, LED Board Ass'y
Main Board Ass'y
Board connection point
No.
Circuit Number
1
P103
2A,2B
P501,P701
3A,3B,3C
P803,P804,P801
4
P901
5A,5B
P806
6
P952
7
P104
TROUBLE SHOOTING GUIDE
2A
2B
7
3A
Pin count
Connections
80
LD driver
40
DMD Board
3
FAN
4
Temp
4
IR
10
WIFI, Bluetooth
4
KEY pad
- 11 -
3C
3A
6
Symptoms of a bad connection
Display turns off immediately after power on. or no image
(none functional of LD)
No image (none functional of DPP ASIC)
Fan doesn't work, and set turns off automatically
set turns off automatically
Remote controller Function is not working
Wi-Fi, Bluetooth Function is not working
Keypad Function is not working
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LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5B
3B
4
1
5A
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