Samsung SH18BW6 Service Manual page 88

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
Samsung Electronics
26005A(2)_1.indd 9
Unplug the power cord and
plug it after 30 seconds
Is STD lamp blinking?
Yes
Does operation
start when swing button
of the remote control unit
pushed?
No
Voltage at
pin #30~#34 of micom (IC04)
change?(Squarewave)
Yes
Voltage at
pin #2~#5 of CN61(motor connector)
change?(Squarewave)
Yes
Up/Down louver motor is faulty.
No
Check as in the procedure
No Power.
Yes
Normal
No
Micom (IC04) is faulty.
No
Driver IC05/06 (ULN2003A) is faulty.
Troubleshooting
12-4
2006-04-14 ｿﾀﾈﾄ 5:05:10