In order to suppress excessive temperature rise in the machine and maintain equipment quality, a temperature sensor (imaging temperature sensor (thermistor)) [A] is installed in the machine. The imaging temperature sensor (thermistor) detects the temperature in the machine, and controls cooling.
Overview of cooling operation in the machine
The temperature in the machine is detected during output and after output, and the interior of the machine is cooled by fan operation (stepwise operation of fans, prolonged fan rotation after paper has passed through) according to the temperature inside the machine.
However, if the temperature inside the machine rises significantly due to passing a large volume of paper, in addition to fan operation, the PPM is reduced to control the temperature in the machine.
Cooling operation during output
Cooling operation is done under the following conditions.
Part name | Temperature measured by Imaging temperature sensor (thermistor) | ||||||
|---|---|---|---|---|---|---|---|
| - 34 | 34 | 35 | 36 | 37 | 38 | 40*1 | |
Fusing exhaust fan | ON | ON | ON | ON | ON | ON | ON |
Ozone exhaust fan | 20% | 20% | 30% | 30% | 40% | 40% | 40% |
Toner supply cooling fan | - | - | - | ON | ON | ON | ON |
Development air intake fan / right*3 | - | - | - | ON | ON | ON | ON |
Drive cooling fan | - | - | - | ON | ON | ON | ON |
Main exhaust fan | - | - | - | ON | ON | ON | ON |
Paper exit cooling fan*2 | ON | ON | ON | ON | ON | ON | ON |
PSU cooling fan*2 | ON | ON | ON | ON | ON | ON | ON |
Controller box cooling fan *2 | ON | ON | ON | ON | ON | ON | ON |
The temperature that the fans start to operate can be set with SP1-955 (Fan Operation Switch Temp.).
*1 If the imaging temperature reaches 39°C, each fan will continue operating until it falls by 2°C.
*2 Operating condition:
- When the time interval from the previous job is less than 10 minutes. Or, when the time interval from the previous job is more than 10 minutes, and 5 minutes have elapsed from machine start.
*3 Operating condition:
- For 36°C or above, full speed rotation at 24V
- For less than 36°C, rotated at low speed with voltage reduced to 13V (rotating speed approximately 50%)
- Changes from low speed rotation to full speed rotation when printing continues for more than 5 minutes while the temperature inside the machine is 36°C or lower
Cooling operation after output
Usually, after output, fan operation is suspended.
If the temperature in the machine after output is high, fan rotation is continued after output to cool the interior of the machine.