HP M750 series

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 1-18 Primary transfer
ITB
Primary transfer bias
Primary transfer roller
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 1-19 Secondary transfer
ITB
Secondary transfer bias
Secondary transfer roller
Paper
Secondary transfer
opposed roller
ENWW Image-formation system 31