When The Louver Does Not Operate - LG Single "A" Service Manual

5. Trouble Shooting

6.5 When the 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 or CN0L/R Connector
• Check the soldering condition(on PCB) of CN-U/D or CN0L/R Connector
• Confirm that there is DC +12V between pin ➀ of CN-U/D, CN0L/R and GND.
• Confirm that there is a soldering short at following terminals.
- Between
1
- Between
4
• Confirm the assembly condition that are catching and interfering parts in the link of the
vertical louver
Be sure to disconnect the power cable plug from the plug socket before disassembling the
equipment for a repair. Internal components and circuit boards are at main potential when the
equipment is connected to the power cables. This voltage is extremely dangerous and may
cause death or severe injury if come in contact with it.
Be sure to turn off power switch before connect or disconnect connector, or parts damage may
be occurred.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the operating circuit of the vertical louver
, , and of MICOM
2 3 4
, , and of IC01M
5 6 7
If there are no problems after above checks.
- Between , , and
17 18 19
- Between , , and
5 6 7 8
- 88 -
of MICOM
20
of IC01M
LGE Internal Use Only