HP LASERJET ENTERPRISE 500 - Page 46

High voltage power supply
The high-voltage power supply delivers the high-voltage biases to the following components used to
transfer toner during the image-formation process:
●
Primary-charging roller (in the cartridge)
●
Developing roller (in the cartridge)
●
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 1-8 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.
10 Chapter 1 Theory of operation ENWW