HP LASERJET ENTERPRISE M855 - Page 61

High-voltage power supply
The high-voltage power supply (HVPS) applies biases to the following components:
●
Primary charging roller
●
Developing roller
●
T1 roller
●
T2 roller
●
Static charge eliminator
●
Pressure roller
The following figure shows the system block diagram of the high-voltage power supply.
NOTE: The primary charging roller and the developing roller are in the cartridge.
Figure 1-5 High-voltage power supply block diagram
Primary charging
bias circuit
Developing bias
circuit
T1 bias
circuit
T2 bias
circuit
Static charge
eliminator bias
circuit
Fuser bias
circuit
Fuser sleeve Pressure roller
Process cartridge
Photosensitive drum
T1 roller
Static charge eliminator
T2 roller
DC controller
High-voltage power supply D
High-voltage power supply T
ENWW Engine-control system 19