High-voltage power supply
The DC controller controls the high-voltage power supply to generate biases.
Figure 1-9 High-voltage power supply
Secondary transfer bias circuit
TRS2
TRI-1
Primary charging bias circuit
DEV high-voltage power supply
DEV-4
DEV-3
DEV-2
DEV-1
PRI-4
DC controller
TR2 high-voltage power supply
Primary transfer bias circuit
TR1 high-voltage power supply
TRI-2
TRI-3
TRI-4
PRI-3
PRI-2
PRI-1
FG
Developing bias circuit
The high-voltage power supply (HVPS) applies biases to the following components:
●
Primary charging roller: The primary charging bias is applied to the surface of the photosensitive
drum to charge it uniformly negative as a preparation for the image formation.
●
Developing roller: The developing bias is used to adhere toner to an electrostatic latent image
formed on the photosensitive drum.
ENWW
Engine-control system
21
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