Pioneer CDXP23S is an old model and has been top useful for me to find this Manual. CD Player is still repaired.
Text excerpt from page 13 (click to view)
DISMANTLING INSTRUCTIONS
Dismantling the CDR module
� Remove top cover and ornamental cover from the tray first � see description on page 4-1. � move tray back to closed position. � to dismantle the complete module: - loosen 1 screw to bottom cabinet on rear side (see picture 16) and 1 screw to front cabinet (see picture 17) - disengage catch to front (see picture 15) - move module backwards until catches to bottom cabinet become free and pull it up.