Xerox Phaser 6100 Service Manual page 113

4) Jam at C (Jam in duplex area)
Jams in the duplex area occur while printing the reverse
side of the paper. After printing the front side, the
duplex solenoid must operate in order to feed the paper
back into the duplex path. If the solenoid fails, paper
may be stuck in the exit roller and is not fully ejected to
the exit tray.
If the duplex solenoid is operating properly paper is fed
back into the printer. If the leading edge of the paper
does not reach the feed sensor in time, then a Jam at C
is displayed on the control panel.
This can be cause by paper being jammed in the duplex
path area.
5) Jam at MPT
Paper could not be picked from the MPT.
After picking the paper, paper feeds but doesn't reach
the feed sensor in time.
Feed sensor is faulty and does not detect paper.
Maintenance and Diagnostics
CASSETTE
SCF
SCF Path
Service Manual 7-3
Exit Sensor
Feed Sensor
Feed Sensor
MPT Empty Sensor