Phaser 7500 Printer Service Manual 8-201
Service Parts Disassembly
When replacing the Backplane PWB, be sure to remove the EEPROM from the
old PWB and install it to the new PWB.
When installing the Backplane PWB, align and insert the 2 protrusions of the
Backplane PWB into the square holes on the Frame, and make sure that the
PWB is fully inserted into the gap of the guide section.