Canon imagerunner C5180 Service Manual page 258

2.High-Voltage Control
The high-voltage unit is used to supply high voltage to each of the blocks in the image formation system.
(For details, see the appropriate sections.)
Secondary
transfer
external roller
HV1
(1 each for
YMCBk)
HV: high-voltage PCB
Y M
HV2
High-voltage unit
C
Developing
cylinder
HV4
(1 for YM; 1
for CBk)
F-9-12
Chapter 9
Bk
Primary charging
roller
Photosensitive
drum
Downstream
auxiliary
brush
Upstream
auxiliary
brush
HV3
Secondary
transfer
high-voltage unit
9-17