Toshiba e-STUDIO556 Service Manual page 143

2. 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
3 - 97
Pressure Counter
Error
(08-
roller
code
thermist 2002)
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
-
-
e-STUDIO556/656/756/856/557/657/757/857
OUTLINE OF THE MACHINE
Error
judging
timing
Power ON
On usual
Fixed time
On usual
Fixed time
On usual
3