Canon imageRUNNER 2270 Service Manual page 405

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A: start-up control

B: copying temperature control

C: 65 (%) power supply

D: X (%) power supply

E: Y (%) power supply

9.3.2.4 Copying Temperature Control

The machine uses this mechanism to control the temperature of the fixing heater to an

optimum level while a recording medium is passing through the fixing film assembly;

specifically,

1.the machine varies the power ratio in relation to the difference between the temperature

detected by the thermistor and the target control temperature.

2.if the temperature detected by the thermistor is higher than the target control temperature

for a specific period of time (0.6 sec), the machine will decrease the power ratio; if lower,

it will increase the power rate.

9.3.2.5 Changing the Fixing Film Control Temperature

When a fixing failure occurs or creases appear, the fixing film control temperature can be

changed in the service mode as shown below.

COPIER> OPTION> BODY> TEMP-CON (to switch the fixing temperature mode for

heavy paper)

COPIER> OPTION> BODY> TEMPCON2 (to switch the fixing temperature mode)

0: OFF (default), 1: -10 deg C, 2: -6 deg C, 3: -3 deg C, 4: +3 deg C, 5: +6 deg C, 6: +10

deg C, 7: 15 deg C

9.3.2.6 Temperature Control in Response to Automatic Double-

The second side of an automatic double-sided copy requires lower control temperature in

comparison with the first side. For this reason, the control temperature is lowered for the

second side of an automatic double-sided copy so as to prevent adverse effects such as rises

in temperature.

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