Panasonic SA-AK520E Service Manual page 34

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.
10.7.3. Disassembly and reassembly for mechanism base drive unit
Step 1 Remove 3 screws.
Step 2 Release the claw, and then remove the gear holder.
Step 3 Remove the belt and change gear spring.
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