Part numbers:
604K69760, 604K69763, 604K69764

Common error codes:
377.130 = Reg Sensor On Jam (Duplex Direct)
377.131 = Duplex Wait Sensor On Jam
377.307 = Duplex Cover Open
377.308 = L/H High Cover Open
377.907 = Duplex Wait Sensor Static Jam

Compatible models:
Phaser 7800DN
Phaser 7800DX
Phaser 7800GX