Toshiba E-STUDIO520 - Page 303

14
March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 FUSER UNIT
14 - 13
7) Abnormality detection by the thermistors
The table below shows the judging conditions of abnormal temperatures of the fuser roller and the
pressure roller, and their checking timing.
Checking
timing
Condi-
tion
Temperature judged
Error
code
Counter
(08-400)
Error
judging
timing
Center
ther-
mistor
Rear
ther-
mistor
Front
ther-
mistor
Pres-
sure
roller
ther-
mistor
Power ON 1 240°C or
above
- - - C449 9 Power ON
- 250°C or
above
- -
- - 270°C or
above
-
- - - 250°C or
above
C468 8
2 40°C or
below
150°C or
above
- - C412 2
150°C or
above
40°C or
below
- -
Detecting
40°C
1 240°C or
above
- - - C449 19 On usual
- 250°C or
above
- -
- - 270°C or
above
-
- - - 250°C or
above
C468 18
2 40°C or
below
- - - C412
(C411)
2
(1)
Fixed time
- 40°C or
below
- -
Detecting
100°C
1 240°C or
above
- - - C449 19 On usual
- 250°C or
above
- -
- - 270°C or
above
-
- - - 250°C or
above
C468 18
2 100°C or
below
- - - C446
(C443)
3
(6)
Fixed time
- 100°C or
below
- -
When pre-
running end
temperature /
ready tem-
perature is
detected
1 240°C or
above
- - - C449 22 On usual
- 250°C or
above
- -
- - 270°C or
above
-