High-Voltage Pcb 1; B. High-Voltage Pcb - Canon CP660 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM
The copier's high-voltage circuit consists of three PCBs; i.e., high-voltage PCB 1,
high-voltage PCB 2, and separation static elimination high-voltage PCB. These PCBs are
controlled by the DC controller PCB, and each in turn controls the following:

High-voltage PCB 1:

High-voltage PCB 2:
Separation static elimination high-voltage PCB:
The DC controller PCB sets the various high-voltage levels and pulse outputs of ref-
erence frequency, and turns on and off the various high-voltage loads.
B. High-Voltage PCB 1
The high-voltage power supply PCB 1 consists of the following three circuits:
Black developing bias
generation circuit
Primary
charging bias
generation
circuit
DC controller PCB
4-26
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primary charging roller, black/color developing cylinder
intermediate transfer drum, ITD cleaning roller, secondary
transfer belt, secondary pre-transfer charging assembly,
upper fixing roller
paper after secondary transfer
Black toner
level detection
circuit
developing
cylinder
Color developing
bias generation
circuit
High-voltage PCB 1
Figure 4-603
Black developing
cylinder
ANT
Color
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Primary charging roller