Read Sharp MX-M550U / MX-M620U (serv.man2) Service Manual online
MX-M550/M620/M700 BLOCK DIAGRAM / ブロック図 2 - 4
4. PCU PWB
ADDRESS
(A0
to
A20)
DATA
(D0
to
D15)
CLOCK
CL
OCK
D
A
TA,CL
OCK
PCU_RESET
RESET
UART
(MSW-MON)
UART
(DTR,
DSR)
RES
POF
Clutch,
solenoid,
relay,
Brushless
motor,
LED,
PWM
output,
s
ynchronous
motor
+24V1
+5V2
+12V2
+3.3V1
FW
RESET
ANALOG-OUT
FWS
Analog
input
(Fusing
thermistor)
High
temperature
protection
Thermistor
open
detection
Thermistor
open
detection
Fusing
control
signal
DATA,
CLOCK
Oscillator
(LSU,
MOTOR,
PWM)
UART(TXD,R
XD)
UART
(DTR,
DSR)
+5VLD
+12VS
power
+5VS
power
PROFF_CNT,
P
RON_FAX
DC
power
Analog
power
(Vref
)
+12V2
+5VSpower
F
W-SUB
+12VS
power
Brush
motor
Synchronous
motor
Sensor
input
(PPD,
A
DU,
D
V
s
ignal)
Sensor
input
Sensor
input
Sensor
input
High
voltage
trouble
detection
PGM
c
lock,
control
signal
DCCNT
(Power
relay
control)
Fusing
thermistor
Temperature/humidity
sensor
AV
voltage
monitor
Process/developing
tank
signal
Analog
input
Analog
output
/PCU _RESET
System
CLOCK
UART
(TXD,
R
XD)
(LCC,
FINISHER,
INSERTER)
(LCC,
FINISHER,
INSERTER)
(LCC,
F
INISHER,
INSERTER)
High
voltage
control
signal
(Enable,
PWM
output)
Clutch,
solenoid,
relay,
Brushless
motor,
PWM
output
(FAN)
+24V1
FLASH
R
OM
write
control
(FWP)
+24V
(Interlock
line)
+24V (Interlock
line)
BD,
control
signal,
VIDEO
signal
Paper
width
detection
Door
open
detection
(Interlock
switch)
FWS
Fusing
control
signal
Optiondetection
CL
OCK
Fusing
heater
control
Fusing
heater
relay
control
Mode
select
signal
Detect
control
+38V
monitor
INT_PR
(relay)
BUP_PR
(relay)
HSYNC,
PAGE
VIDEO
s
ignal
+12VS
powermonitor
/PCU_RESET
Stepping
motor
control
signal
Fusing
control
signal
CLOCK
Power
s
witch
m
onitor
+24V (Interlock
line)
+24V (Interlock
line)
+24V(Interlock
line)
I/O
I/O
PMC
ANALOG
IC
SWITCH
OP-AMP
OP-AMP
XTAL
COMPARATOR
ROM
FLASH
D
C
P
S
P
C
U
COMPARATOR
EEPROM
OSC
COMPARATOR
BUCKUP
CIRCUIT
REGURAT-
ORIC
OP-AMP
L
S
U
ASIC2
ASIC1
FPGA
CPU
DACs
S-RAM
SWITCH
DOOR
H
V
u
n
GATE-ARRAY
A
C
P
W
B
DRIVE
CIRCUIT
C
O
N
T
R
O
LL
E
R
S
U
B
D
C
P
S
S
U
B
D
C
P
S
COMPARATOR
P
W
B
D
R
IV
E
R
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