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Transfer Unit
The transfer unit mainly consists of the static eliminator and transfer roller which rotates in connection with the drum unit.
Transfer Bias/Separation Static Eliminator Bias Control
DC bias is applied to the transfer roller and static eliminator.
[1]
Separation static eliminator bias control signal
[2]
Transfer bias control signal
[3]
Environment sensor detection signal
Transfer Bias Constant Current Control
The transfer bias control circuit on the DC controller PCB controls the transfer bias applied to the transfer roller to keep the constant current.
Transfer bias level control
The transfer bias output varies according to the environment, paper type, paper width, and/or source of paper detected by the environment sensor (HU1).
Cleaning Bias Control
To return the toner adhered on the transfer roller to the photosensitive drum, negative voltage is applied at the last rotation.
Separation Static Eliminator Bias Control
Either of the two types of negative voltage (low bias or high bias) is applied to the static eliminator depending on the print mode and sequence for reducing electrostatic suction to facilitate separation of paper from the photosensitive drum.