●
Primary-transfer roller
●
Secondary-transfer roller
Figure 1-4 High-voltage power supply circuits
Y
M
C
K
The high-voltage power supply contains several separate circuits.
Table 1-7 High-voltage power supply circuits
Circuit Description
Primary-charging-bias generation DC negative bias is applied to the surface of the photosensitive drum to prepare it
for image formation.
Developing-bias generation DC negative bias adheres the toner to each photosensitive drum during the image-
formation process.
Primary-transfer-bias generation DC positive bias transfers the latent toner image from each photosensitive drum
onto the ITB.
Secondary-transfer-bias generation Two DC biases, one positive and one negative, transfer the toner from the ITB onto
the paper.
10 Chapter 1 Theory of operation ENWW
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