Xerox WorkCentre Pro 412 Service Manual page 55

5-5-7-3. Organization of the Device
HVPS is comprised of electrification output unit, bias output unit and transfer output unit.
1) Input Unit.
2) Electrification Output (Enable) Unit: MHV (Main High Voltage).
3) Bias Output (Enable) Unit: DEV (Development Voltage)/Supply (Supply Voltage)/BLADE (Blade Volt-
age).
4) Transfer '+' Output (Enable) Unit: THV (+) (Transfer High Voltage(+)).
5) Transfer '-' Output (Enable) Unit: THV (-) (Transfer High Voltage(-)).
6) Switching Unit.
7) Feedback Unit.
8) Regulation Unit.
9) Output Unit.
SWITCHING
CONTROL UNIT
HV-PWM
THVPWM
PWM
CONTROL UNIT
THVEA
SWITCHING
CONTROL UNIT
THVREAD
THV
ENVIRONMENT
RECOGNITION
CIRCUIT
WorkCentre Pro 412
Launch Issue
TRANS
REGULATION
CIRCUIT
Electrification Unit Block-Diagram
SWITCHING
TRANS
CONTROL UNIT
FE E DBACK
TRANS
FEED BACK
Transfer Output Unit Block Diagram
August 2001
OUTPUT
CIRCUIT
REGULATION
CIRCUIT
REGULATION
CIRCUIT
Circuit Description
MHV
THV
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