Xerox Phaser 6250 Service Manual page 335

Caution
Re-install the Engine Control Board and the Card Cage prior to installing the
Chute Assembly Registration and the Housing Assembly Bias to prevent
damaging the bias springs.
Caution
Position the replacement board so that the alignment pin goes through the
hole next to the left rear screw hole in the board.
Note
Ensure that all 3 tabs on the card cage are fully inserted when reassembling
the unit.
Note
The black connector P30 and the beige connector P23 on the Engine Control
Board are not used.
Service Parts Disassembly 8-109