13
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e-STUDIO555/655/755/855
FUSER UNIT
13 - 7
13.4.5
Temperature detection section
To maintain the fuser roller at a constant temperature, the two fuser roller thermistors (front and rear)
detect the fuser roller temperature and control the on/off of the IH coil. The abnormal temperature of the
IH coil is detected by the three fuser roller thermistors (front, center and rear), while that of the pressure
roller is detected by the pressure roller thermistor.
1. Relation between the thermistor output voltage and surface temperature of the fuser roller
2. Control of the surface temperature of the fuser roller
Fig. 13-6
Output voltages of thermistors [V]
Surface temperatures of fuser roller [°C]
Approx. 0.5
40
Approx. 2.0
100
Approx. 3.4
160
Approx. 3.6
170
Approx. 3.8
185
Approx. 4.0
200
IH coil ON
200
170
0
Temperature of
fuser roller
(Example: e-STUDIO855)
During
printing
During printing
Ready
Warming-up
Ready
During
waiting
C
ON
ON
OFF ON OFF
ON
ON
OFF
OFF