19. Fusing section
Theory of Operation Ver. 8.0 Jun. 2008
14
2
2
Composition/Operation
19.3.8
Sensor disconnection detection control
• If the temperature of the NC sensor/thermistor fails to reach the specified temperature in
the given period after the warm-up started, the sensor is judged to have disconnection,
and the trouble code will appear.
19.3.9
Heating roller rotate detection
• If the heating roller doesn’t rotate even after the IH heater is conducted, an appropriate
temperature measurement and temperature control cannot be made. If the IH heater is
ON without rotating of the heating roller for a long time, the heat concentrate on the cer-
tain area and the roller may get damaged due to the heat.
• If the heating roller doesn’t rotate even after the IH heater ON, the trouble message for
heater roller rotating failure appear. (C3102)
• As two heating roller rotation sensors are used, the rotation can be detected even if
either sensor get broken, which improves the safety.
19.3.10
Detection of a new fusing unit
• When a new fusing unit is installed in the machine, the life counter is automatically
cleared through the machine’s capability of detecting a new fusing unit.
• The new unit is detected when the sub power switch is turned ON.
Roller name
Sensor name: code
Trouble code
Heating roller
NC sensor: TEMS
C3925
Fusing high temperature
abnormality_NC sensor
Heating roller thermistor/2: TH2
C3921
Fusing high temperature
abnormality_heating center
Heating roller thermistor/3: TH3
C3922
Fusing high temperature
abnormality_heating edge
Fusing pres-
sure roller
Fusing pressure roller thermistor: TH4 C3923
Fusing high temperature
abnormality_pressure
Soaking
roller
Soaking roller thermistor/1: TH5
C3924
Fusing high temperature
abnormality_Soaking
2
A00JT2C267AA
Heating roller
Heating roller rotation detection gear
Heating roller rotation
sensor/2 (PS57)
Cam gear
Heating roller rotation sensor/1 (PS56)
Theory of Operation Y107522-3
