14
March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 FUSER UNIT
14 - 9
14.4.5 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
*1: Only for the JPD model *2: Only for the TWD model
Fig.14-6
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
Temperature
Fusing control
e-STUDIO850 e-STUDIO520/600/720
200°C or above 200°C or above IH coil OFF
200°C 200°C (185°C *1) Ready status
170 to 200°C
(160 to 200°C *1)
160 to 200°C
(150 to 200°C *1)
(155 to 200°C *2)
IH coil ON
170°C or below
(160°C or below *1)
160°Cor below
(150°C or below *1)
(155°C or below *2)
Copying is interrupted and the fuser roller is
heated. (Waiting status)
IH coil ON
200
170
0
Temperature of
fuser roller
(Example: e-STUDIO850)
During
printing
During printingReadyWarming-up Ready
During
waiting
C
ON
ON OFF ON OFF
ON
ONOFF
OFF
To Next Page
Loading...
