Panasonic SA-AK640E Service Manual page 203

Step 3: Release the top cover from the tray rear stopper
as arrow shown and remove the top cover.
Step 4: Remove the open lever spring.
Step 5: Insert the service gear into the service hole and
rotate the gear anti-clockwise.
Step 6: Press and hold the plunger lever and rotate the
gear clockwise until it stop.
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