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 16 (click to view)
TH-37PV60E / TH-37PX60B / TH-42PV60E / TH-42PX60B
6.22. Remove the G-Board and GKBoard
1. Remove the front bracket. (See section 6.21.) 2. Remove the screws (�3 ) and remove the metal cover.
6.23. Remove the speaker L, R
1. Remove the sponge
3. Remove the screws (�3 metal frame.
) and remove the front side 2. Disconnect the relay couplers 3. Remove the screws (�2 L, R. each) and remove the speaker
4. Remove the screws (�3 (G3-GK3).
) and disconnect the couplers
5. Remove the G-Board and GK-Board.
6.24. Remove the S-Board
1. Disconnect the coupler (S1). 2. Remove the screws (�2 frame. 3. Remove the screws (�2 ) and remove the S-Board metal ) and remove the S-Board.