Toshiba e-STUDIO555 Service Manual page 285

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 Conditio
timing n
Power ON 1
2
Detecting 1
40°C
2
Detecting 1
100°C
2
When pre- 1
running end
temperature /
ready
temperature
is detected
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Temperature judged
Center Rear Front
thermist thermist thermist
or or or
240°C or - -
above
- 250°C or -
above
- - 270°C or
above
- - -
40°C or 150°C or -
below above
150°C or 40°C or -
above below
240°C or - -
above
- 250°C or -
above
- - 270°C or
above
- - -
40°C or - -
below
- 40°C or -
below
240°C or - -
above
- 250°C or -
above
- - 270°C or
above
- - -
100°C or - -
below
- 100°C or -
below
240°C or - -
above
- 250°C or -
above
- - 270°C or
above
13 - 11
Pressure
Error Counter
roller
code (08-400)
thermist
or
- C449 9
-
-
250°C or C468 8
above
- C412 2
-
- C449 19
-
-
250°C or C468 18
above
- C412 2
(C411) (1)
-
- C449 21
-
-
250°C or C468 18
above
- C446 3
(C443) (6)
-
- C449 22
-
-
Error
judging
timing
Power ON
On usual
Fixed time
On usual
Fixed time
On usual
e-STUDIO555/655/755/855
FUSER UNIT
13