Casio XJ-450 Service Manual & Parts List page 22

Removing the lamp shield C (silver plate with a thermister which monitors the temperature in
the lamp house attached in the lower case)
1 Remove two screws (S3).
Note: Make sure to fix the lamp shield in the correct direction.
The thermister should be fixed in the lamp.
Removing the jack PCB, back panel, filter unit
1 Remove two screws (S3).
2 Remove three screws (S2) (S11) out of four in the back panel.
This removes the jack panel.
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Screws (S3)
Screws (S3)
Screw (S11)
Screws (S2)