HP Color LaserJet CM1312 Series - Page 94

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 5-6 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
high-voltage
generation circuit
Developing
high-voltage
generation circuit
Primary transfer
high-voltage
generation circuit
Cartridge
Secondary transfer
high-voltage
generation circuit
ITB cleaning brush
high-voltage
generation circuit
ITB cleaning roller
high-voltage
generation circuit
Blade
high-voltage
generation circuit
Secondary
transfer roller
ITB cleaning unit
80 Chapter 5 Theory of operation ENWW