Canon iR2000 Series, Service Manual

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CHAPTER 7 FIXING SYSTEM
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
7 - 5
2.2.1 Control at Time of Power-On
a. Conditions Ending the Wait Period
To decrease the length of the Wait period, the machine ends the period if any of the fol-
lowing conditions exits, thus shifting to standby state:
• 25 sec or more passes from the time when the fixing heater (H101) is first supplied
with power and when the fixing temperature reaches 150ºC or higher.
• 27 sec passes from the time when the fixing heater (H101) is first supplied with power
and when the fixing temperature reaches 145ºC or higher.
However, to ensure good fixing immediately after the power switch is turned on, the
fixing heater is continuously kept ON until the target temperature is reached even
when the machine remains in standby state.
b. Controlling to the Target Temperature
To ensure fixing immediately after the power switch is turned on, a target temperature
is used as a reference, as determined in relation to the fixing temperature at time of when
the power switch is turned on and to the state of the printer.
• If the fixing temperature is lower than 80ºC when the power switch is turned on,
For printing, a temperature higher than the control temperature is used (as determined
by the selected mode). Printing is started when the target temperature is reached, and
the target temperature is decreased in stages in relation to the passage of time (con-
tinuous printing) until the control temperature for a specific mode is reached.
• If the fixing temperature is 80ºC or higher when the power switch is turned on,
For printing, the control temperature is used as the target temperature (as determined
by the selected mode). Printing is started when the target temperature is reached, and
the target temperature is decreased in stages in relation to the passage of time (con-
tinuous printing) until the control temperature for a specific mode is reached.