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)
AV-N48P74 AV-N56P74 2.7.10 REAR PANEL (1) Loosen 7 screws [ L ]. (2) Remove 4 screws [ M ]. (3) Raise slightly REAR PANEL upward. (4) Take out the REAR PANEL. NOTE : â¢ Before the rear panel is inserted into the cabinet, release the short-circuit between the [SB] connector (1) pin and (2) pin of the DIGITAL INPUT UNIT. (Refer to "CAUTION AT DISASSEMBLY" on Page 11). â¢ After releasing the short-circuit between the [SB] connectors, do not turn the power on until the rear panel is inserted into the cabinet. Prior to starting the work, be sure to read the following written instructions on the CAUTION LABEL attached to the REAR PANEL. UNPLUG THE POWER CORD FROM AC OUTLET BEFORE OPEN THE REAR COVER (PANEL). When the rear cover (panel) is removed, follow "CAUTION AT DISASSEMBLY" procedure in the service manual before plugging the TV's power cord into an AC outlet. Failure to follow the procedure will result in PERMANENT damage to some of the television features. 2.7.11 PARTITION â¢ Take out the REAR PANEL. (1) Pull out the PARTITION back ward. 2.7.12 REAR COVER â¢ Take out the SPEAKER GRILLE. â¢ Take out the FRONT CONTROL BOX. â¢ Take out the SCREEN ASS'Y. (1) Remove 2 screws [ N ]. (Fig.6) (2) Remove 2 screws [ O ] from front side. (3) Slightly pull for backside to disengage of the REAR COVER from hooks. (4) Take out the REAR COVER. â¢ Because of the large size, at least two persons are recommended for removal and reassemble.