HP laserjet m712 Fehlerbehebungsanleitung

The high-voltage power supply applies positive or negative voltage biases to the following components:

●

Primary charging roller

●

Developing roller

●

Transfer roller

●

Static charge eliminator

●

Fuser film

  High-voltage power-supply PCA

Fuser

Fuser film

Pressure roller

Transfer bias

circuit

Static charge eliminator

DC controller

Photosensitive drum

Transfer roller

High-voltage power supply

Primary

charging bias

circuit

Developing

bias circuit

Static charge

eliminatior

bias circuit

To primary charge roller

To developing roller

Cartridge

The DC controller controls the high-voltage power supply to generate the following biases.

●

Primary charging bias

The primary charging bias is used to charge the surface of the photosensitive drum evenly to

prepare for image formation. The primary charging bias circuit generates the bias.

●

Developing bias

The developing bias is used to adhere toner to an electrostatic latent image formed on the

photosensitive drum. The developing bias circuit generates the bias.

●

Transfer bias

The transfer bias is used to transfer the toner from the photosensitive drum onto the paper. The

transfer bias circuit generates the bias. The transfer bias circuit also generates the reverse bias to

clean the transfer roller.

ENWW

Engine control system

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