Basic Sequence; Power-On Sequence; Down Sequence - Canon imageRUNNER 2270 Service Manual

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9.2 Basic Sequence

If the thermistor detection temperature is less than 100 deg C when the power is turned on

or the sleep mode is released, the control described below is performed.

1. Increases the speed of the fixing motor in phases (1/4 speed to 1/2 speed and then to

normal speed).

2. Performs the start-up current control.

3. Performs the temperature control at 200 deg C for 10 sec.

4. Stops the fixing motor. When the fixing motor is stopped, the fixing temperature control

is also stopped, and the machine enters the stand-by mode.

When the print preparation request is received during wait time, the control described below

is performed.

1. Increases the speed of the fixing motor in phases (1/4 speed to 1/2 speed and then to

normal speed).

2. Performs the start-up current control.

3. Starts measuring the time passed after the machine reaches the target temperature T deg

Target temperature T deg C = 200 deg C (iR3570/iR4570): 190 deg C (iR2270/iR2870)

4. Starts feeding in the case of printing in plain paper mode.

5. Starts feeding when 5 sec have passed after the machine reached the target temperature

in the case of printing in special paper mode.

Down sequence is to prevent the machine from operating when the temperature of the end

portion of the fixing film exceeds a specific temperature as when using small-size paper

continuously. The details of the control are described below:

1. The sub thermistor detection temperature is 275 deg C or more.

2. Reduces the number of sheets passed by increasing the paper interval.

3. Returns the number of sheets to the normal when the sub thermistor detection

temperature is 265 deg C or less.

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