2.2Power Supply Unit

The power supply unit supplies +5 V and +24 V to the main control board according to 230 VAC /120 VAC.

Output voltage

Application

 

 

+5 V

Used to generate a logic circuit and a high voltage.

 

 

+24 V

Used to drive the motor and electromagnetic clutch.

 

 

The power supply unit also contains a heater drive circuit.

2.3High-Voltage Power Supply Board

(1)High-Voltage power supply circuit

The high-voltage power supply circuit generates the following voltages required for the electro-photographic processor from +5 V according to the control sequence from the main control board. When the cover is open, +5 V supply is automatically interrupted to stop high- voltage output.

Output

 

Voltage

Application

 

 

 

CH

–1.35 KV

Voltage to be applied to a charge roller.

 

 

 

DB

–300 V/+300 V

Voltage to be applied to a developing roller.

 

 

 

SB

–450 V/ 0 V

Voltage to be applied to a sponge roller.

 

 

 

 

CB

+400

V

Voltage to be applied to a cleaning roller.

 

 

 

 

TR

+500

V ~ +3.5 KV/–750 V

Voltage to be applied to a transfer roller.

 

 

 

 

Caution: The TR voltage varies with medium and transfer roller impedance.

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Oki 4W PLUS, 4M specifications Power supply unit also contains a heater drive circuit

4M, 4W PLUS specifications

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