Canon imagePRESS C1 P, Service Manual, Page: 428 / 1265

Chapter 7
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7.12 Drum Heater
7.12.1 Drum Heater Control
0013-9681
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
The sensitivity of the photosensitive drum varies due to the installation environment (temperature, humidity).
This machine has the drum heater inside of the drum axis to keep the drum surface temperature stable.
The function of thermo-sensor and thermistor
The dirt thermo-sensor recognizes the temperature as lower than the actual, causing the excessive activation of the heater and the temperature rise of the drum sur-
face.
To prevent this, the thermistor turns OFF the heater when detecting the upper limit of temperature.
F-7-99
[1] Thermo-sensor
[2] Thermistor
[3] Photosensitive drum
[4] Drum heater
The drum heater control is activated by turning ON the environmental switch on the inside left side of the machine regardless of whether the main switch is turned
on or off.
Temperature control by the thermo-sensor (32 deg C/42 deg C) is possible by switching the drum temperature switch.
The timing of switching is determined by the absolute water level inside the machine.
Memo:
Switch the drum temperature switch to the lower side ('H') for high-humidity environment.
Whether the environment is under high humidity or not is judged by the absolute water level inside the machine at service mode.
When the value of COPIER>DISPLAY>ANALOG>ABS-HUM is 10g or more.
[1]
[2]
[3]
[4]
DC-CON