Oki 24DX manual Power Supply Unit

Models: 24DX

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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

 

 

+5 V

Logic circuit supply voltage

 

 

+30 V

Motor and fan drive voltage and source voltage for high-voltage supply

 

 

+8 V

Reset circuit, RS232C Line voltage

 

 

–8 V

RS232C Line voltage

 

 

+3.8V

LED HEAD supply voltage

 

 

(2)High voltage power supply circuit

This circuit generates the following voltages necessary for electro-photographic processing from +30 V according to the control sequence from the control board. When cover open state is detected, +30 V supply is automatically interrupted to stop the supply of all the high-voltage outputs.

Output

 

Voltage

Use

Remarks

 

 

 

 

Sub-CH

-15 μA

Voltage applied to Sub charging roller

 

 

 

 

 

CH

-1.30 KV

Voltage applied to charging roller

 

 

 

 

 

 

DB

-220

V/+300 V

Voltage applied to developing roller

 

 

 

 

 

 

SB

-450

V

Voltage applied to toner supply roller

 

 

 

 

 

TR

+4 KV/-1.3 kV

Voltage applied to transfer roller

Variable + Only

 

 

 

 

CB

+450 V/-1350V

Voltage applied to clearimng roller

 

 

 

 

 

 

(3)Photosensor

The photosensor mounted on this power supply unit supervises the paper running state during printing.

40930701TH DRAFT Vesion

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Oki 24DX manual Power Supply Unit