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When the power is switched ON, the CPU
reads the voltage of pin 74 (ANI6J. If the
voltage is higher than the specified value,
the CPU assumes a fixing unit error before
power-ON and cuts the current to the
fixing roller heater.
If a fling unit error occurs, do not
Note:
switch the power on for about 10
minutes. As a safety measure, the
roller heater will not operate even if
you switch the power on during
this time.
upper flxlng roller
temperat"re ("C)
I
0~
Power ON
2 - 32
/RDY slgnal ON
/PRNT slgnal ON
Figure 2-37
3. Fixing roller heater start sequence
The sequence of operations from power-on
to standby is as follows:
The CPU turns the fixing roller heater
11
ON a preset time after power-ON (after
CPU initialization).
The CPU assumes a fixing unit error
when the upper fiing roller does not
reach 172°C (187'C for initial warm-
up) within 200 seconds after the fixing
healer is turned ON.
When the upper fixing roller temperature
reaches 172OC (187°C for initial warm-
up temperature control], the READY
signal f/RDY) is output to the video
controller.
After the /RDY signal is output, 172°C
4)
(187°C for temperature control in the
morning] is maintained until the PRINT
signal [/PRNT) is sent from the video
conlroller.
~.__ ____~~~________
,
Last ,ota,,on end
Normal pnnt
temperature
Standby temperature
Abnormally low
temperature-detectIon
temperature
_-;._-__~_._~
Time (sac)
Power OFF
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