Panasonic SA-AK330GC Service Manual page 23

Step 8 Release the both claws, and then draw the disc tray.
Step 9 With forcing the left guide bar manually because the left
guide bar interfers with claw, draw the disc tray.
[Installation of the disc tray after replacement]
Step 1 Slide the drive rack fully in the direction of arrow.
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Step 2 Holding the drive rack not to move, install the disc tray.
Step 3 Align the drive rack with the drive gear.
NOTE:
Force the right guide bar of tray base manually not to move
upwards.
Step 4 Holding the disc tray manually, push the disc tray in the
direction of the arrow.
SA-AK330GC / SA-AK330GN