LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0, AS-W126URH1/UBH1/UWH1/UMH1 service manual

Troubleshooting Guide

Trouble 5 When the horizontal 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 Connector

•Check the soldering condition(on PCB) of CN-U/D Connector

Check the operating circuit of the vertical louver

•Confirm that there is DC +12V between pin ➀ of CN-U/D and GND.

•Confirm that there is a soldering short at following terminals. - Between 41 , 42 , 43 and 44 of MICOM

- Between 4 , 5 , 6	and 7 of IC01M
- Between 10 , 11 , 12	and 13 of IC01M

If there are no problems after above checks.

•Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver

Service Manual 73