Samsung APH289SEF Service Manual page 32

5-3-6 When the Air flow blade(up/down) does not operate.
1. Causes of Failure
1) Cut or poor contact of motor connecting harness of the Air flow blade(up/down).
2) Defect by device hanging.
3) Poor Main PCB.
4) Poor stepping motor
2. Inspection Items
1) Contact of motor connecting harness of the Air flow blade(up/down)?
2) Output wave style from panel PCB port(PORT) during motor on?
3. Inspection Procedure
Turn on and turn the Air flow blade(up/down)
Check swing of the Air flow blade(up/down), OK?
Check connector wire, cut or wrong?
Check voltage between Main PCB
CN202 No. #5 and GND, DC12V?
Check wave style from Main PCB
CN202 No. #1, #2, #3, #4, spherical?
Exchange the Air flow blade(up/down).
Samsung Electronics
on with remote control.
No
No
Yes
Yes
Yes
Good motor of the Air flow
blade(up/down)
Inspect and exchange
Yes
connection harness.
No
Exchange panel PCB.
No
Inspect and exchange U204.
Troubleshooting
31