HP LaserJet Pro Color MFP M476dw - Page 34

High-voltage power supply
The DC controller controls the high-voltage power supply to generate high-voltage biases. The high-voltage
power supply generates the high-voltage biases that are applied to the primary charging roller, developing
roller, primary transfer pad, secondary transfer roller, and ITB cleaning unit.
Figure 1-7 High-voltage power supply
ITB
TR1_1 TR1_23 TR1_23 TR1_4
TR2
ICLB
BLD1
BLD2
BLD3 BLD4
DEV1 DEV2 DEV3 DEV4
PRI
ICLR
Photosensitive drum
Primary transfer pad
DC controller
High-voltage power supply
Primary charging
bias circuit
Developing bias
circuit
Primary transfer
bias circuit
Cartridge
Secondary transfer
bias circuit
ITB cleaning brush
bias circuit
ITB cleaning roller
bias circuit
Blade bias circuit
Secondary
transfer roller
ITB cleaning unit
YKMC
14 Chapter 1 Theory of operation ENWW