- 58 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Troubleshooting Guide
When Vertical Louver does not operate.
• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.
• If the regular torque is detected when rotating the Vertical Louver with
hands
Normal
• Check the connecting condition of CN-UP/DOWN Connector
• Check the soldering condition(on PWB) of CN-UP/DOWN Connector
Check the operating circuit of the Vertical Louver
• Confirm that there is DC +12V between pin
(RED) of CN-UP/DOWN and
GND.
• Confirm that there is a soldering short at following terminals.
- Between
60
,
61
,
62
and
63
of MICOM
- Between
2
,
3
,
4
and
5
of IC01M
- Between
12
,
13
,
14
,
15
of IC01M
- Between
1
,
2
,
3
,
4
and
5
of CN-UP/DOWN
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts in
the rotation radial of the Vertical Louver
