LG LMU240HE Service Manual - Page 71

When the louver does not operate., When Vertical Louver does not operate. - problems

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Troubleshooting Guide Trouble 5 When the louver does not operate. 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 Service Manual 71

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Service Manual
71
Troubleshooting Guide
When the louver does not operate.
Trouble 5
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