Oki B 4100 Maintenance Manual page 515

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(6) Transfer

The transfer roller is composed of conductive sponge material. This roller is set so that the surface of the

OPC drum and sheets of paper will adhere closely.

A sheet of paper is placed on the surface of the OPC drum and the positive charge opposite to the negative

charge of a toner is applied from the reverse side by the transfer roller.

When a high negative voltage is applied from the power supply to the transfer roller, the positive charge

induced on the surface of the transfer roller moves to the paper side at the contact part between the transfer

roller and the sheet of paper. The positive charge on the lower side of the sheet of paper then causes the

negatively charged toner adhering to the surface of the OPC drum to move to the upper side of the sheet.

This enables transfer to the sheet of paper.

High-voltage

Transfer roller

power supply

40055101TH Rev.4

Troubleshooting