LG LM-1830H2L Svc Manual page 49

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
• Check the connecting condition of CN-U/D Connector
• Check the soldering condition(on PWB) of CN-U/D Connector
• Confirm that there is DC + 12V between pin
GND.
• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Vertical Louver
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Only for training and service purposes
Normal
Check the operating circuit of the Vertical Louver
If there are no problems after above checks
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(RED) of CN-U/D and
LGE Internal Use Only