Panasonic SC-HM910 Service Manual page 16

SC-HM910/SC-HM810
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:
Step 2 Holding the drive rack not to move, install the disc tray.
Step 3 Align the drive rack with the drive gear.
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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.