Samsung Electronics
Troubleshooting
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
Driver IC05/06 (ULN2003A) is faulty.
No
Micom (IC04) is faulty.
No
Normal
Yes
Check as in the procedure
No Power.
No
Is STD lamp blinking?
Unplug the power cord and
plug it after 30 seconds
Does operation
start when swing button
of the remote control unit
pushed?
Voltage at
pin #30~#34 of micom (IC04)
change?(Squarewave)
Voltage at
pin #2 ~ #5 of CN61(motor connector)
change?(Squarewave)
Up/Down louver motor is faulty.
12-4
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