LG LCU240CP Service Manual - Page 37

When Vertical Louver does not operate

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Trouble 5 When Vertical Louver does not operate Troubleshooting Guide • 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 Connector • Check the soldering condition(on PWB) of CN-U/D Connector Check the operating circuit of the Vertical Louver • Confirm that there is DC +12V between pin (RED) of CN-U/D and GND. 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 37

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Service Manual
37
Troubleshooting Guide
•
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 Connector
•
Check the soldering condition(on PWB) of CN-U/D Connector
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
Check the operating circuit of the Vertical Louver
•
Confirm that there is DC
+
12V between pin
(RED) of CN-U/D and
GND.
When Vertical Louver does not operate
Trouble 5