Canon imageRUNNER 2520 Series, Service Manual, Page: 80 / 402

■ Print temperature control
Fixing
temperature
STBY
INTR PRNT
Startup
(warm-up
rotation)
control
temperature
During-print
control
temperature Sheet-to
-sheet
control
temperature
Command for
flying start Command for
print start
● Startup (warm-up rotation) temperature control
To increase fixing temperature to be ready for printing after receiving the print-start command
● Print temperature control
To set optimal target temperature to prevent fixing failure or offset, and keep the specified target temperature during printing
1. Setting target temperature
Target temperature is specified depending on the paper type, paper size, elapsed time since the last control (including the
standby control) of fixing temperature and fixing temperature at the start of warm-up control.
2. Temperature control during printing
When the paper passes in the fixing unit, the fixing temperature is controlled to keep the target value (see the table on the
next page) according to the detection result of main thermistor.
3. Sheet-to-sheet distance temperature control
To prevent the excessive temperature rise and to save the power consumption, the target temperature is set 5 deg C low (in
case of plain paper *1) from the printing temperature.
*1. Set to 5, 15 or 20 deg C low according paper type
Target temperature during printing
2. Technical Explanation
70