Read Sharp MX-2640N / MX-2640NR / MX-2640FN / MX-3140N / MX-3140NR / MX-3140FN / MX-3640N / MX-3640NR / MX-3640FN (serv.man11) Service Manual online
MX-3640N BLOCK DIAGRAM
1 – 8
B. Japan
(1)
F model internal FAX
TEL/L
IU
Conn
ecto
r
LIU
J
PN
PWB
FAX
MAIN
PWB
MJ1
(LINE)
MJ2
(TEL)
OFF
foc
k
detection
S
rel
a
y
S
i3
019
S
i3
056
S
ilicon
DAA
S
i3
056
CH
IP
S
ET
VOICE
CODEC
S
i3
000
H
a
ndset
AMP
NJM21
3
5M
MR
rel
a
y
CI
Dete
ction
Pol
a
rity
inversion
Detection
(Not
mount)
EC
rel
a
y
(Not
mount)
p
a
ra
-r
inger
voice
mess
a
ge
Outpu
t
S
pe
a
ker
FAX
A
S
IC
MB
87
F
4
9
3
0
MODEM
MMD
5020
PIC
microcomputer
PIC16F690
CP
U
S
H
7706
MFP
IF
Connector
With
secure
locking
device
BM
3
0B-
S
HLD
S
JTAG
Con
nector
1
4pin
(Not
mount)
㪈㪮㪃㪎㪮⋭䉣䊈䊝䊷䊄ᤨ
േ
S
pred
S
pectrum
CY25811
S
XCT
Cryst
a
l
R
eson
a
tor
24.5
76MHz
Volt
a
ge
Regul
a
tor
R117
3S
001B
Cryst
a
l
Reson
a
tor
14.7456MHz
RE
S
ET
IC
BD4
5285G
H
a
ndset
Connector
MD-
S
63
50-90
S
pe
a
ker
Connector
S
02B-
PA
S
K
S
TATU
S
LED_
0
S
TATU
S
LED_
1
(Not
moun
t)
volt
a
ge
level
DC
DC
-150V
Mess
a
ge
Outpu
t
En
a
bl
e
Volt
a
ge
Re
gul
a
tor
NJU7772F
18
Po
wer
Ampli
fier
LM4819
Volum
e
Ch
a
nge
BU40
66
NJM
3
414
CI
Dete
ction
volt
a
ge
level
Filter
+2
4V
D
etectio
n
+24V
+12V
CI
Fi
ter
CI
Fi
te
r
Filter
volt
a
ge
level
S
pe
a
ker
Microphone
OFF
fock
detection
RH
S
-
+5
V2
ECON
MRON
EX
H
S
-
S
ON
2
S
ON
1
AFE
_
C
L
K
AFE
_
RE
S
-
A
S
PC
LK
ABITCL
K
AR
XD
ATX
D
B
S
PC
LK
BBITCL
K
BR
XD
BTX
D
S
PK
(a
n
a
lo
g)
RGDT-
CI
ᬌ
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
M
S
G(
An
a
log
)
CID-
+5
V2
+1
2
+2
4
+5
VA
+5V
A
BZ
EN
_
S
PK
O
N
-
EN_
B
ZON-
VOL
A
VOL
B
VO
L
C
VO
L
D
S
PM
U
T
E-
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_
24
V
-
+2
4V
+5
V
+
3
.3
V
+5
V2
RE
S
_
FAX
-
F
A
X_
RX
D
(D
)+
FAX_
RXD(D
)-
FAX
_
TXD(D)
+
FAX
_
T
X
D(
D)-
FAX
_
CT
S
(D
)-
FAX
_
RT
S
(D
)-
FAX
_
RX
D(
C
S
)+
FAX
_
R
X
D
(C
S
)-
F
A
X_
TXD
(C
S
)+
FAX
_
TXD(C
S
)-
FAX
_
CT
S
(C
S
)-
FAX
_
RT
S
(C
S
)-
FLV
P
P
Ve
rs
io
n
ID
CNC
T_F
AX
-
3
.3
V
1.
9V
PICPGM_E
N
WU
P_
FA
X-
TEL
ID2
16bit
16bit
16bit
16bit
16bit
16bit
JTAG
UART
UART
D
o
wn
lo
a
d
Lo
g
Con
nector
(Not
mount)
WORK
MEMORY
S
DRAM
64Mbit
A
3
V
64
S
40ETP-
G6
PROGRAM
FLA
S
H
ROM
16Mb
VHIM29LV16B-
1Q
FA
X
IMAGE
MEMOR
Y
(Not
mou
nt)
FLA
S
HR
O
M
16Mb
it
Click on the first or last page to see other MX-2640N / MX-2640NR / MX-2640FN / MX-3140N / MX-3140NR / MX-3140FN / MX-3640N / MX-3640NR / MX-3640FN (serv.man11) service manuals if exist.