2.2Power Supply Unit
The power supply unit consists of an AC filter circuit, a low voltage power supply circuit, a high voltage power supply circuit, heater drive circuit, and photosensors.
(1)Low voltage power supply circuit
This circuit generates the following voltages.
Output voltage | Use |
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+5 V | Logic circuit supply voltage |
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+30 V | Motor and fan drive voltage and source voltage for |
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+8 V | Reset circuit, RS232C Line voltage |
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RS232C Line voltage | |
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+3.8V | LED HEAD supply voltage |
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(2)High voltage power supply circuit
This circuit generates the following voltages necessary for
Output |
| Voltage | Use | Remarks |
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Voltage applied to Sub charging roller |
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CH | Voltage applied to charging roller |
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DB | V/+300 V | Voltage applied to developing roller |
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SB | V | Voltage applied to toner supply roller |
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TR | +4 | Voltage applied to transfer roller | Variable + Only | |
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CB | +450 | Voltage applied to clearimng roller |
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(3)Photosensor
The photosensor mounted on this power supply unit supervises the paper running state during printing.
40930701TH DRAFT Vesion | 20 / |