Samsung SC09AWH, Service Manual

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Troubleshooting
23 Samsung Electronics
5-3-4 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
Remove power cord and plug in again in approx.
5 seconds.
UP/DOWN louver motor is faulty.
No
Check as in the procedure
"No Power parts".
Yes
Normal
Does operation start when
swing button of the remote control unit
pushed?
Is STD lamp blinking?
No
Micom (IC04) is faulty.
Voltage at pin #57~#60
of micom (IC04) change?
(Squarewave)
No
Driver IC06/08 (ULN2003A) is faulty.
Voltage at pin #16 of
IC06(ULN2003A) and #10~#12 of
IC08(ULN2003A) change?
(Squarewave)
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