LG LSC121PMA Service Manual - Page 47

When Vertical Louver does not operate.

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6. 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-U/D, CN-L/R Connector • Check the soldering condition(on PWB) of CN-U/D, CN-L/R Connector Check the operating circuit of the Vertical Louver • Confirm that there is DC +12V between pin (RED) of CN-U/D, CN-L/R and GND. • Confirm that there is a soldering short at following terminals. - Between 62 , 61 , 60 and 59 of MICOM - Between 57 , 56 , 55 and 54 of MICOM - Between 51 , 50 , 49 and 48 of MICOM - Between 1 , 2 , 3 , 4 and 5 of CN-U/D, CN-L/R 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 - 47 -

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- 47 -
• 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-U/D, CN-L/R Connector
• Check the soldering condition(on PWB) of CN-U/D, CN-L/R Connector
Check the operating circuit of the Vertical Louver
• Confirm that there is DC
+
12V between pin
(RED) of CN-U/D, CN-L/R
and GND.
• Confirm that there is a soldering short at following terminals.
- Between
62
,
61
,
60
and
59
of MICOM
- Between
57
,
56
,
55
and
54
of MICOM
- Between
51
,
50
,
49
and
48
of MICOM
- Between
1
,
2
,
3
,
4
and
5
of CN-U/D, CN-L/R
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
6. When Vertical Louver does not operate.