Read Sharp MX-FXX1 (serv.man2) Service Manual online
MX-FXX1 ELECTRICAL SECTION 8 – 1
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Service Manual
[8] ELECTRICAL SECTION
1. Block diagram
TE/LIU
connector
FAX
IMAGE
MEMORY
Not
install
FLASH
R
OM
16Mbit
LIU
P
WB
WORK
MEMORY
SDRAM
64Mbit
x
2
PROGRAM
FLASH
R
OM
8Mb
x
2
FAX
MAIN
PWB
FLASH
R
OM
PWB
MJ1
(LINE)
MJ2
(TEL)
BT
relay
Exter
nally-
connected
hook
detection
circuit
S
relay
Si3015
Si3021
Silicon
D
AA
Si3044
CHIP
SET
AFE_CLK
AFE_RES-
AFE_ASPCLK
AFE_ABITCLK
AFE_ARXD
AFE_ATXD
VOICE
CODEC
Si3000
Handset
(Japan
only)
AMP
Speaker
Microphone
MSG(Analog)
OFF
fook
d
etection
MR
relay
CI
detection
circuit
EC
relay
AFE_BSPCLK
AFE_BBITCLK
AFE_BRXD
AFE_BTXD
SPK(Analog)
RHS-
CI-
HS1-
HS2-
CION
150VON
48VON
HDMUTE-
Speaker
Speaker
circuit
Input
s
elect
Sound
volume
detection
BZ
EN_SPKON-
EN_BZON-
VOLA
VOLB
VOLC
SPMUTE-
NEW
A
SIC
MODEM
(MN195006E)
ECON
EXHKD-
MRON
SON1
SON2
PIC
microcomputer
(PIC16F627A)
CID-
RGDT-(CI
d
etection)
CPU
SH7706
UART
Download
MFP
IF
connector
FAX_TXD(D)+
FAX_TXD(D)-
FAX_RXD(D)+
FAX_RXD(D)-
FAX_CTS(D)-
FAX_RTS(D)-
RE
S_MFP-
FFVPP
MSW_MON-
WUP_FAX-
PLED
RES_FAX-
CNCT_FAX-
+12V
+3.3V
+5V2
16bit
32bit
32bit
16bit
16bit
32bit
+5V2
+5V2
E2PROM
(CAT24W02)
I2C
JTAG
debug
connector
JTAG
UART
Debug
connector
Oper
ation
in
1
W/7W
energy-sa
v
e
mode
FAX_TXD(CS)+
FAX_TXD(CS)-
FAX_RXD(CS)+
FAX_RXD(CS)-
FAX_CTS(CS)-
FAX_RTS(CS)-
VOLD
Spred
Spectrum
X’TAL
24.576MHz
Voltage
Regulator
1.9V
X’TAL
14.7456MHz
RESET
IC
(PST591IMT)
RESET-
+3.3V
EYE
pattern
connector
2bit
Handset
connector
Speaker
connector
POWER
L
ED
STATUS
LED
TELID
Voltage
level
DCDC
-150V
DCDC
48V
Po
la
ri
ty
re
v
e
rsal
detection
Pseudo-
ri
nger
Voice
m
essage
output
circuit
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