Samsung DVD-P355B/XEU Service Manual page 33

Troubleshooting
No Tray open/close
ZIC1 129,130
No
Open ; "L"
Check ZIC1 perpheral circuit.
Close ; "H"
(OPEN, CLOSE Waveform)
Yes
Check FIC1-13, 14
No
Check FIC1 perpheral circuit.
output at OPEN/CLOSE.
Yes
Check signal line state from
FIC1-13, 14 to tray motor.
Samsung Electronics 5-7