Ricoh Aficio BP20N, Service Manual

Page: 143 / 144

BLOCK DIAGRAM
SM 8-1 G144/G145
Appe
ndix
APPENDIX
BLOCK DIAGRAM
Power Cord
FUSER ASSY
Th
er
mi
st
o
r
To
Co
nt
roll
er
IN
-LE
T
CA
RTRIDGE
INFO
.
SC
F
(O
ption)
(Option)
So
leno
id
PT
L
Po
w
er
On
Rese
t
Vo
lt
ag
e
De
tect
or
US
B
2.
0
IEEE1
284
SPG Pm
SD
R A
M
(16MB) FLASH
ME
M
O
R
Y
2MB
MA
IN
MO
T
O
R
A3977
Mot
o
r dr
iver
He
ater
-
A
C
C
ontro
ller Block
S
M
PS B
lo
c
k
HVPS
Bl
o
ck
EX
IT S
E
N
SO
R
F.
G
+24V
+5V
+3.3V
GN
D
LS
U
FA
N
PA
N
E
L
+24V
Cov
e
r-
Op
en
Sw
it
ch
MHV
OPC
G
N
D
SUPPL
Y
DE
V
THV
BI
AS PWM
THV PWM
MH
V PWM
MPF
-SEN
SOR
M
P-
SE
NS
O
R
P/EMPT
Y
-S
E
NS
OR
FE
ED
-S
EN
S
O
R
EEP
RO
M
C
rys
tal
12
MHZ
Freq
.
Sp
read
Ma
in
Clock
G144X01.WMF