Panasonic SA-HT340EB Service Manual page 39

Step 4 Remove the optical pickup unit in the arrow direction till
it stops.
Step 5 Remove 2 screws.
Step 6 Remove the drive rack.
Step 7 Remove 1 screw.
Step 8 Slide the shaft in the arrow direction.
Step 9 Lift the optical pickup unit with the shaft.
Step 10 Remove the optical pickup unit.
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SA-HT340E / SA-HT340EB / SA-HT340EG