Panasonic SA-BTT775GA Service Manual page 73

Step 3 Gently push in the tray unit until it is closed fully.
Caution: Do not use strong force during pushing of the
tray unit.
Repeat Step 1 to Step 2, when the tray unit cannot be push
forwards.
10.15.3. Replacement of BD Traverse Unit
(Note: This section is for reference only.)
Refer to "Disassembly of Dust Cover".
Refer to "Disassembly of Tray".
10.15.3.1. Disassembly of BD Traverse Unit
Step 1 Slide the Slide Cam until it come to a stop.
Step 2 Lift up the FFC Plastic Sheet.
Step 3 Release 45P FFC from the slots.
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