MX-2640N, MX-2640NR, MX-2640FN, MX-3140N, MX-3140NR, MX-3140FN, MX-3640N, MX-3640NR, MX-3640FN (serv.man11). MX2640N-MX3140N-MX3640N Circuit Diagram - Sharp Copying Equipment Service Manual (repair manual). Page 8

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MX-3640N  BLOCK DIAGRAM  
1 –  7
7. FAX SECTION/ FAX セク シ ョ ン
A.
Except Japan
(1)
MX-FX11
TEL/L
IU
Conn
ecto
r
FA
X
IM
A
G
E
MEMORY
(Not
mou
nt)
FLA
S
HR
O
M
16Mb
it
LIU
EX
PWB
F
AX
MAIN
PWB
MJ1
(LINE)
MJ2
(TEL)
OFF
foc
k
detection
S
rel
a
y
S
i3
019
S
i3
056
S
ili
c
on
DA
A
S
i3
056
CH
IP
S
ET
CI
Dete
ction
Po
la
ri
ty
inver
s
ion
Dete
ction
(Not
m
ount)
S
pe
a
ker
FA
X
A
S
IC
MB
87
F
4
9
3
0
MODEM
MMD
5020
PIC
microcomputer
PIC16F690
CPU
S
H
7706
MFP
IF
Connector
With
secure
loc
king
de
vice
BM
3
0B-
S
HLD
S
JTAG
Con
nector
1
4pin
(Not
mount)
Lo
g
Con
nector
(Not
mount)
Oper
a
tion
in
1W/7W
energy-s
a
v
e
mode
Cryst
a
l
R
eson
a
tor
24.5
76MHz
Cryst
a
l
R
eson
a
tor
1
4.7456MHz
S
pe
a
ke
r
Co
nn
e
c
to
r
S
02B
-
PA
S
K
S
TATU
S
LED_
0
S
TATU
S
LED_
1
(Not
moun
t)
v
olt
a
ge
le
v
el
Volt
a
ge
Re
gul
a
tor
NJU7772F
18
Po
wer
Amplifier
LM4819
V
olum
e
Ch
a
nge
BU
4
0
6
6
NJM
3
414
v
olt
a
ge
le
v
el
Filter
+2
4V
D
etectio
n
+24V
+12V
CI
Fi
ter
CI
Fi
te
r
Filter
v
olt
a
ge
le
v
el
RH
S
-
+5
V2
ECON
MRON
EX
H
S
-
S
ON2
S
ON1
AFE_
C
L
K
AFE
_
RE
S
-
A
S
PC
LK
ABITCL
K
AR
XD
AT
X
D
B
S
PC
LK
BBITCL
K
BR
XD
BTXD
S
PK
(a
n
a
lo
g)
RGDT-
(CI
detection)
HD
MUTE-
S
I3
_RE
S
-
TEL
ID
CI2-
CI-
H
S
1-
H
S
2-
CIO
N
15
0VO
N
M
S
GMUT
E
CID-
+5
V2
+1
2
+2
4
+5
VA
+5
V
A
BZ
EN
_
S
PKO
N-
EN_
B
ZON-
VO
L
A
VO
L
B
VO
L
C
VO
L
D
S
PM
UTE-
3
.3
V
1.
8V
MD
M
3
.3
V
RE
S
ET
-
3
.3
V
+5
V
+5
VA
MD
M
3
.3
V
+
3
.3
V
+2
4V
MO
N_
24V
-
+2
4V
+5
V
+
3
.3
V
+5
V2
RE
S
_F
A
X
-
FA
X
_
R
X
D(
D
)+
F
A
X_
RXD(D)
-
F
A
X
_
TXD(D)
+
FAX_T
X
D(
D)-
FA
X
_
C
T
S
(D
)-
FA
X
_
R
T
S
(D
)-
FAX_
RXD(C
S
)+
FAX_
RX
D
(C
S
)-
F
A
X_
TXD(
C
S
)+
F
A
X
_
TXD(C
S
)-
FA
X
_
C
T
S
(C
S
)-
FA
X
_
R
T
S
(C
S
)-
FL
V
P
P
Ve
rs
io
n
ID
CNC
T_FAX-
3
.3
V
1.
9V
PI
CP
G
M
_
E
N
WU
P_
FA
X-
TEL
ID2
16bit
16bit
16bit
16bit
16bit
16bit
JTAG
UA
R
T
UA
R
T
D
o
wn
lo
a
d
S
pred
S
pectr
um
CY25811
S
XCT
PR
O
G
RAM
FLA
S
HR
O
M
16
M
b
VHIM29LV1
6
B-1Q
WO
RK
MEMORY
S
DRAM
64Mb
it
A
3
64
S
40ETP-
G6
RE
S
ET
IC
BD4
5285G
Volt
a
ge
Re
gul
a
tor
R11
7
3S
001B
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