2RV/2RW/2RX/2RY/3RA-3
7-86
C6400: Zero-cross signal error
During the fuser heater on, the zero cross signal is not input for 1s consecutively.
C6600: Fuser rotation error
Despite the motor stable signal input, the fuser roller rotation detection signal is not input for 2s consecutively.
C6610: Fuser press-release sensor error
1. The fuser pressure release sensor does not turn on even passing 10s after starting the fuser pressure
increase.
2. The fuser pressure release sensor does not turn off even passing 10s after starting the fuser pressure
decrease.
Step Check description Assumed cause Measures Reference
1 Checking the connection The connector is not prop-
erly connected or the wire
is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• Low voltage PWB (YC103)
- Main/engine PWB (YC20)
2 Replacing the low voltage
PWB.
The low voltage PWB is
faulty.
Replace the low voltage
PWB.
3 Replacing the main/engine
PWB
The main/engine PWB is
faulty.
Replace the main/engine
PWB.
Step Check description Assumed cause Measures Reference
1 Removing a piece of paper A piece of paper resides in
the fuser unit and the fuser
pressure release does not
operate properly.
Remove a piece of paper
remaining in the fuser unit.
2 Checking the connection The connector is not prop-
erly connected or the wire
is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• Fuser unit - Main/engine
PWB (YC19)
3 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit.
4 Replacing the main/engine
PWB
The main/engine PWB is
faulty.
Replace the main/engine
PWB.
Step Check description Assumed cause Measures Reference
1 Removing a piece of paper A piece of paper resides in
the fuser unit and the fuser
pressure release does not
operate properly.
Remove a piece of paper
remaining in the fuser unit.