HP Enterprise CP5525 manual Transfer block, Primary transfer, Secondary transfer

Transfer block

Primary transfer

Step 5: The toner on the photosensitive drum is transferred to the intermediate transfer belt (ITB). The ITB is given a positive charge by the bias of the primary transfer roller. The negatively charged toner on the drum surface is transferred onto the ITB. All four color planes are transferred onto the ITB in this step.

Figure 1-18Primary transfer

Primary transfer bias

Primary transfer roller

ITB

Photosensitive drum

Secondary transfer

Step 6: The toner image on the ITB is transferred to the paper. The secondary transfer bias is applied to the secondary transfer roller to charge the paper positive. As the paper passes between the secondary transfer roller and the ITB, the complete toner image on the ITB is transferred onto the paper.

Figure 1-19Secondary transfer

Secondary transfer

opposed roller

ITB

Paper

Secondary transfer roller

Secondary transfer bias

32 Chapter 1 Theory of operation ENWW