Samsung DVD905 Service Manual page 70

No tray open/close
Check SIC4 Pin26, 27
Samsung Electronics
MIC1 Pin84, 85 is
OPEN:L.L?
CLOSE:H.H
Yes
ouput at open/close
Yes
Signal is
reverse output
(based on 4,5)?
Yes
Check line state
from SIC4 Pin26, 27
to tray motor
No
Micom error
No
Check SR24, 25
peripheral circuit
Thoubleshooting
5-9