Xerox Phaser 3450 Service Manual page 150

11.3.3 Composition
HVPS is composed of electric charge printing section, BIAS printing section and transfer printing section.
1) Input section
2) Electric charge printing(ENABLE) section : MHV(MAIN HIGH VOLTAGE)
3) BIAS printing (ENABLE)section :
DEV(DEVELOPMENT VOLTAGE)/SUPPLY(SUPPLY VOLTAGE)
4) Transfer '+' printing (ENABLE)section : THV(+)(TRANSFER HIGH VOLTAGE(+))
5) Transfer '-' printing (ENABLE)section :
THV(-)(TRANSFER HIGH VOLTAGE(-))
6) Switching section
7) Feedback section
8) Rectification section
9) Printing section
11.3.3.1 BLOCK-DIAGRAM of Electric Charge Printing Section
SWITCHING
CONTROL
UNIT
MHV - PWM
11.3.3.2 BLOCK-DIAGRAM of BIAS Printing Section
SWITCHING
CONTROL
UNIT
BIAS - PWM
TRANS
Circuit
FEEDBACK
TRANS
Circuit
CIRCUIT DESCRIPTION
Print Circuit
SUPPLY
Print Circuit
DEV
Service Manual
MHV
11-19