Canon LBP-1260, Руководство по обслуживанию

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Table 2-4
175 175 190 190
175 175 190
190
195
Notes: 1. If the tem-
perature is 50°C or less when
the power is switched ON, this
temperature
control is
per-
formed for 5 minutes to improve
2. The target temperature is
switched depending on print
interval.
See Table 2-5. There are two
classification
continuous
printing and intermittent
printing. Continuous printing
is defined as when the pick-up
system for the next printing is
operated within 12 seconds
after received
signal.
Intermittent printing is more
than 12 seconds.
Table 2-5
3. When the continuous printing is
finished within 5 minutes it is
switched to 190°C or 195°C.
More than 5 minutes it is
switched to 185°C or 190°C.
However when it is
a
middle t e m p e r a t u r e i s
maintained 15 seconds.
4. It is 185°C from paper pick-up
start until the signal is
received, and then it is switched
to 180°C.
5. It is 185°C from paper pick-up
start until the signal is
received, and it is switched
to 190°C or 195°C.
6. It is switched to 180°C after
c o n t i n u o u s of 25
envelopes on normal tempera-
ture control.
7. Under the initial warm-up
temperature
control
intermittent printings is 195°C
and the continuous printings is
205°C.
The printer has the following three
protection functions to prevent incorrect
activation of the
roller:
The CPU monitors the thermistor
voltage. If it is abnormal, the CPU
detects the unit error, interrupts
the power to the roller heater, and
reports it to the video controller.
If the upper roller surface temperature
rises abnormally and the thermistor
voltage falls below about
V (230°C).
the safety circuit in the power supply
interrupts the power to the fixing roller
heater regardless of the CPU output.
If the upper roller surface temperature
rises abnormally and the
temperature exceeds 210°C. the
thermoswitch turns off, interrupting the
power to the
roller heater.
2-31