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LG Electronics Inc. All rights reserved.
Only training and service purposes.
TROUBLE SHOOTING GUIDE
1. Poor Connection
- Main & DLPC Board Ass’y
Board connection point
Main & DLPC Board Ass’y
6A
7
6B
1
2
3
4
5
8A
9A
9B
8B
10
No.
Circuit Number
Pin count Connections
Symptoms of a bad connection
1
P102
8
PSU
No power
2
P4000
4
IR
Not operate to remote controller. No lighting LED indicator at
stand-by mode.
3
P5800
4
SPEAKER
No sound
4
P101
12
WIFI
Not operate wifi & bluetooth.
5
P1002
10
JOYSTICK
Not operate Joystick.
6A,6B
P901,P902
4
FAN
Not operate FAN. The projector will be turned off after 10s as
soon as power on.
7
P104
3
CASE DETECT
If top case is openning, the projector will be turned off after some
seconds as soon as power on.
8A,8B
P9003,P401
20
DLPC B/D
Not operate FAN. The projector will be turned off after 10s as
soon as power on.
9A,9B
P9001,P100
54
DLPC B/D
No image. the projector will be turned off after some seconds as
soon as power on.
10
P1300
20
LD DRIVER B/D
Not operate FAN & No image. The projector will be turned off after
some seconds as soon as power on.
Summary of Contents for HU85LA
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