HP LaserJet Enterprise M552 - High-voltage power supply circuits

High-voltage power supply circuits
The high-voltage power supply contains the following separate circuits.
Figure 1-6 High-voltage power supply circuits
Y
M
C
K
High-voltage power supply D
Primary transfer bias circuit Fusing bias circuit
Pressure roller
Secondary transfer roller
Secondary transfer
bias circuit
Primary charging bias
circuit
Developing bias circuit
DC controller
Primary transfer roller
High-voltage power supply T
ITB cleaning
brush
Y
M
C
K
H
i
g
h-volta
g
e power suppl
y
D
Primar
y
trans
f
er bias circui
t
F
usin
g
bias circui
t
P
r
essu
r
e
r
o
ll
e
r
Secondary transfer roller
n
S
econdar
y
trans
f
er
b
i
as
c
ir
cu
i
t
Primar
y
char
g
in
g
bias
c
ir
cu
i
t
D
evelopin
g
bias circui
t
DC
controller
Primary transfer roller
e
H
i
g
h-volta
g
e power suppl
y
T
ITB cleanin
g
b
r
ush
Table 1-10 High-voltage power supply circuits
Circuit Description
Primary-charging-bias generation The primary charging bias negatively charges the surface of the photosensitive drum to
prepare for image formation.
ENWW Engine-control system 21