Canon 1730, Service Manual

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Technical Explanation > Fixing System > Controls > Print temperature control
Technical Explanation > Fixing System > Controls > Print temperature control
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Standby Temperature Controll
Max. 10 sec
● Flying Start
Purpose:
To reduce time to print the first sheet (FCOT).
Starting conditions:
• When opening the Copyboard Cover or ADF while the detected temperature of the
Main Thermistor is lower than 100 deg C.
• When setting the original on the ADF while the detected temperature of the Main
Thermistor is lower than 100 deg C.
• When the Main Power Switch is turned ON or the machine is recovered from sleep
mode to standby mode while the detected temperature of the Main Thermistor is lower
than 180 deg C
Control description:
The temperature control target is set at 177 deg C and the Fixing Motor is controlled
at half-speed to start operation. The control continues for 10 sec at most until the
machine receives a command to start printing.
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Print temperature control
● Startup (initial rotation) temperature control
A fixing temperature is increased to a printable temperature after receiving a command to
start printing.
● Print temperature control
To set optimal target temperature to prevent fixing failure or offset, and keep the specified
target temperature during printing
A.Setting the target temperature
A target temperature is determined according to the paper type/size, time which
elapsed from when fixing temperature control (including standby control) finished the
last time, and fixing temperature when startup control started.
B.Temperature control during printing
When the paper passes through the Fixing Assembly, temperature is controlled to
keep the target temperature (see the next page) according to the detected temperature
of the Main Thermistor.
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