Samsung AS09HPB, Service Manual

Page: 61 / 96

Troubleshooting
Samsung Electronics 12-4
12-2-3 When the Up/Down Louver Motor Does Not Operate. (Initial Diagnosis)
1. Checklist :
1) Is input voltage normal?
2) Is the Up/Down louver motor properly connected with the connector(CN61)?
2. Troubleshooting procedure
Yes
No
Yes
Yes
Check as in the procedure
No Power.
No
Is STD lamp blinking?
Normal
Yes
Does operation
start when swing button
of the remote control unit
pushed?
Micom(IC04) is faulty.
No
Voltage at
pin #30~#34 of micom(IC04)
change?(Squarewave)
Driver IC05/06(ULN2003A) is faulty.
No
Voltage at
pin #2~#5 of CN61(motor connector)
change?(Squarewave)
Remove power cord and
plug in again in approx. 30 seconds.
Up/Down louver motor is faulty.
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