Sharp MX-5500N / MX-6200N / MX-7000N (serv.man24) Peripheral ▷ View online
MX-CFX1 ELECTRICAL SECTION 11 – 4
B. Circuit Detail
(1) Communication Circuit
1) TxD signal
2)
RxD signal
This circuit communicates with the main unit and the finisher.
TxD0 and TxD1 are data signals transmitted from the main unit and the finisher to the inserter. RxD0 and RxD1 are data signals transmitted
from the inserter to the main unit and the finisher. Logical 1 is represented by +5V, and logical 0 is represented by 0V.
TxD0 and TxD1 are data signals transmitted from the main unit and the finisher to the inserter. RxD0 and RxD1 are data signals transmitted
from the inserter to the main unit and the finisher. Logical 1 is represented by +5V, and logical 0 is represented by 0V.
(2) Sensor Input Circuits
1) Reverse Sensor (H_SEN)
H_SEN uses the reflective sensor integrated with an LED and a
phototransistor.
The sensor detects a sheet between the sensor and the opposite
reflector interrupting the light path.
The CPU (IC6-Pin94, 95, 96) output is transmitted to the sensor to
light the LED through the D/A converter (IC13), the operational
amplifier (IC15.2), and the transistor (Q1). Meanwhile the signal is
transmitted to the CPU (IC6-Pin30) through the noise filters (R4,
C2) and the comparator (IC1.1).
phototransistor.
The sensor detects a sheet between the sensor and the opposite
reflector interrupting the light path.
The CPU (IC6-Pin94, 95, 96) output is transmitted to the sensor to
light the LED through the D/A converter (IC13), the operational
amplifier (IC15.2), and the transistor (Q1). Meanwhile the signal is
transmitted to the CPU (IC6-Pin30) through the noise filters (R4,
C2) and the comparator (IC1.1).
The signal input to the CPU follows the logic: "H" when a sheet is
detected, "L" when not detected.
The analog signal is transmitted to CPU (IC-Pin105) through no
comparator.
R1 and R10 divide the +5V voltage which is applied to the compar-
ator as the reference voltage.
R13 is used to make the reference voltage have hysteresis.
detected, "L" when not detected.
The analog signal is transmitted to CPU (IC-Pin105) through no
comparator.
R1 and R10 divide the +5V voltage which is applied to the compar-
ator as the reference voltage.
R13 is used to make the reference voltage have hysteresis.
2) Paper Exit Sensor (HI_SEN)
HI_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path of the photointerrupter.
HI_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path of the photointerrupter.
The signal is transmitted to the CPU (IC6-Pin106) through the
noise filters (R25,C9).
The signal input to the CPU follow the logic: "L" when a sheet is
detected, "H" when not detected.
noise filters (R25,C9).
The signal input to the CPU follow the logic: "L" when a sheet is
detected, "H" when not detected.
Main Unit
F inis her
Main Unit
F inis her
R evers e S ens or
Paper Exit Sensor
Reverse Unit Open/Closed Sensor
Chassis Cover Open/Closed Sensor
Unused
MX-CFX1 ELECTRICAL SECTION 11 – 5
R39 is a current limiting resistor for the LED. R34 is a load resistor
for the sensor.
3) Reverse Unit Open/Closed Sensor (HYK_SEN)
HYK_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects state of the reverse unit with the lever actuator
interrupting the light path of the photointerrupter.
for the sensor.
3) Reverse Unit Open/Closed Sensor (HYK_SEN)
HYK_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects state of the reverse unit with the lever actuator
interrupting the light path of the photointerrupter.
The signal is transmitted to the CPU (IC6-Pin108) through the
noise filters (R21,C7).
The signal input to the CPU follows the logic: "L" when the reverse
unit is open, "H" when closed.
R37 is a current limiting resistor for the LED. R32 is a load resistor
for the sensor.
noise filters (R21,C7).
The signal input to the CPU follows the logic: "L" when the reverse
unit is open, "H" when closed.
R37 is a current limiting resistor for the LED. R32 is a load resistor
for the sensor.
4) Set Sensor (S_SEN)
S_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects the main unit with the lever actuator interrupting
the light path.
The signal is transmitted to the CPU (IC6-Pin2) through the noise
filters (R56,C16).
The signal input to the CPU follows the logic: "H" when the inserter
is connected to the main unit, "L" when not connected.
R59 is a current limiting resistor for the LED. R58 is a load resistor
for the sensor.
5) Empty Sensor (EMP_SEN)
EMP_SEN uses the photointerrupter including the LED and the
phototransistor in one unit.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin31) through the noise
filters (R7,C4).
The signal input to the CPU is the following logic: the signal is "H"
when a sheet is detected, "L" when not detected.
R12 is the current limiting resistor for the LED. R11 is the load
resistor for the sensor.
S_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects the main unit with the lever actuator interrupting
the light path.
The signal is transmitted to the CPU (IC6-Pin2) through the noise
filters (R56,C16).
The signal input to the CPU follows the logic: "H" when the inserter
is connected to the main unit, "L" when not connected.
R59 is a current limiting resistor for the LED. R58 is a load resistor
for the sensor.
5) Empty Sensor (EMP_SEN)
EMP_SEN uses the photointerrupter including the LED and the
phototransistor in one unit.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin31) through the noise
filters (R7,C4).
The signal input to the CPU is the following logic: the signal is "H"
when a sheet is detected, "L" when not detected.
R12 is the current limiting resistor for the LED. R11 is the load
resistor for the sensor.
6)
Registration Sensor (REG_SEN)
REG_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin32) through the noise
filters (R14,C5).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R17 is a current limiting resistor for the LED. R16 is a load resistor
for the sensor.
7)
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin32) through the noise
filters (R14,C5).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R17 is a current limiting resistor for the LED. R16 is a load resistor
for the sensor.
7)
Timing Sensor (TIM_SEN)
TIM_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin33) through the noise
filters (R19,C6).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R18 is a current limiting resistor for the LED. R31 is a load resistor
for the sensor.
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin33) through the noise
filters (R19,C6).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R18 is a current limiting resistor for the LED. R31 is a load resistor
for the sensor.
8) Paper Width Detection Potentiometer (T_VR)
T_VR is a potentiometer.
The paper width is detected using the output voltage, which may
vary depending on the potentiometer's knob position.
T_VR is a potentiometer.
The paper width is detected using the output voltage, which may
vary depending on the potentiometer's knob position.
The signal is transmitted to the CPU (IC6-Pin112) through the
noise filters (R48,C12).
noise filters (R48,C12).
S et S ens or
E mpty S ens or
R egis tration S ens or
T iming S ens or
Paper Width Detection Potentiometer
Tray Sensor
Sub Tray Drawn Detection Sensor
Sub Tray Folded Detection Sensor
Unused
MX-CFX1 ELECTRICAL SECTION 11 – 6
9) Tray Sensor (T_SEN)
T_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin126) through the
noise filters (R46,C15).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R52 is a load resistor for the sensor.
10) JAM Cover Open/Closed Switch (JCK_SW)
T_SEN uses the photointerrupter integrated with an LED and a
phototransistor.
The sensor detects a sheet with the lever actuator interrupting the
light path.
The signal is transmitted to the CPU (IC6-Pin126) through the
noise filters (R46,C15).
The signal input to the CPU follows the logic: "L" when a sheet is
detected, "H" when not detected.
R52 is a load resistor for the sensor.
10) JAM Cover Open/Closed Switch (JCK_SW)
JCK_SW is the JAM cover open/closed detection switch using the
microswitch.
+24V is supplied to the switch. The contacts open when the JAM
cover is open.
When the switch turns on, +24V voltage is applied to the cathode of
ZD2, the base current flows to Q12, and Q12 turns on to transmit
the signal to the CPU (IC6-Pin111).
The signal is also used as the +24V conduction signal simulta-
neously.
The signal input to the CPU follows the logic: "H" when the JAM
cover is open, "L" when closed.
The +24V conduction signal follows the logic: "L" when the +24V
voltage is conducted.
microswitch.
+24V is supplied to the switch. The contacts open when the JAM
cover is open.
When the switch turns on, +24V voltage is applied to the cathode of
ZD2, the base current flows to Q12, and Q12 turns on to transmit
the signal to the CPU (IC6-Pin111).
The signal is also used as the +24V conduction signal simulta-
neously.
The signal input to the CPU follows the logic: "H" when the JAM
cover is open, "L" when closed.
The +24V conduction signal follows the logic: "L" when the +24V
voltage is conducted.
(3) Motor Drive Circuits
1) Paper Feed Motor Drive Circuit (K_MOT)
This circuit rotates/stops K_MOT and controls its rotational direc-
tion and the motor current. The circuit consists of the CPU (IC6),
the D/A converter (IC13), the constant-current chopper driver IC
(IC9), and other elements.
tion and the motor current. The circuit consists of the CPU (IC6),
the D/A converter (IC13), the constant-current chopper driver IC
(IC9), and other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin37,38,70,71) control the motor rotation speed and
rotational direction.
The analog signal from the D/A converter (IC13-Pin11) is divided
into the constant voltage by R53 and R54. The divided voltage is
applied to IC9-Pin9,11 to set the motor current.
CPU (IC6-Pin37,38,70,71) control the motor rotation speed and
rotational direction.
The analog signal from the D/A converter (IC13-Pin11) is divided
into the constant voltage by R53 and R54. The divided voltage is
applied to IC9-Pin9,11 to set the motor current.
2) Reverse Motor Drive Circuit (H_MOT)
This circuit rotates/stops H_MOTand controls its rotational direction
and the motor current. The circuit consists of the CPU (IC6), the D/
A converter (IC13), the constant-current chopper driver IC (IC7),
and other elements.
and the motor current. The circuit consists of the CPU (IC6), the D/
A converter (IC13), the constant-current chopper driver IC (IC7),
and other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin118, 120, 121, 122) control the motor rotation speed
and rotational direction.
The analog signal from the D/A converter (IC13-Pin5) is divided
into the constant voltage by R74 and R75. The divided voltage is
applied to IC7-Pin3,14 to set the motor current.
CPU (IC6-Pin118, 120, 121, 122) control the motor rotation speed
and rotational direction.
The analog signal from the D/A converter (IC13-Pin5) is divided
into the constant voltage by R74 and R75. The divided voltage is
applied to IC7-Pin3,14 to set the motor current.
Not Mounted
P aper F eed MOT
Not Mounted
R evers e MOT
MX-CFX1 ELECTRICAL SECTION 11 – 7
3) Transport Motor Drive Circuit (Y_MOT)
This circuit rotates/stops Y_MOT and controls its rotational direc-
tion and the motor current. The circuit consists of the CPU (IC6),
the D/A converter (IC13), the constant-current chopper driver IC
(IC8), and other elements.
tion and the motor current. The circuit consists of the CPU (IC6),
the D/A converter (IC13), the constant-current chopper driver IC
(IC8), and other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin97, 98, 101, 102) control the motor rotation speed
and rotational direction.
The analog signal from the D/A converter (IC13-Pin6) is divided
into the constant voltage by R76 and R77. The divided voltage is
applied to IC8-Pin3,14 to set the motor current.
CPU (IC6-Pin97, 98, 101, 102) control the motor rotation speed
and rotational direction.
The analog signal from the D/A converter (IC13-Pin6) is divided
into the constant voltage by R76 and R77. The divided voltage is
applied to IC8-Pin3,14 to set the motor current.
4) Flapper Solenoid and Registration Clutch Drive Circuit (F_SOL and R_CL)
This circuit controls the flapper solenoid operation and the registra-
tion clutch engagement.
When the signal F_SOL is "H", Q2 turns on to activate the solenoid.
Similarly, when the signal R_CL is "H", Q3 turns on to engage the
clutch.
tion clutch engagement.
When the signal F_SOL is "H", Q2 turns on to activate the solenoid.
Similarly, when the signal R_CL is "H", Q3 turns on to engage the
clutch.
The flapper solenoid drive signal is the PWM signal. At the begin-
ning of the solenoid activation, the signal is adjusted to set the sole-
noid at 100% duty cycle. After the plunger of the solenoid is pulled
in, the signal is adjusted to set the solenoid at 70% duty cycle in
order to reduce the temperature rise with the plunger hold.
5) Reset Circuit
ning of the solenoid activation, the signal is adjusted to set the sole-
noid at 100% duty cycle. After the plunger of the solenoid is pulled
in, the signal is adjusted to set the solenoid at 70% duty cycle in
order to reduce the temperature rise with the plunger hold.
5) Reset Circuit
The circuit transmits a reset signal to the CPU when the power is
turned on or a power brownout is detected.
The circuit includes a watchdog timer intended to the CPU system
operation diagnosis.
turned on or a power brownout is detected.
The circuit includes a watchdog timer intended to the CPU system
operation diagnosis.
After the power is turned on, normally IC3-Pin8 (*RES) is "H". How-
ever, when the +5V voltage falls to 4.2V or less because of the
power turned off or any trouble, IC3-Pin8 turns "L" to reset the
CPU.
The clock signal from the CPU is transmitted to IC3-Pin3 (CK) at a
regular interval to clear the watchdog timer embedded in IC3. How-
ever, if the clock signal from the CPU disappears because of a sys-
tem trouble, IC3-Pin8 turns "L" to reset the CPU and stop the
system operation.
6)
ever, when the +5V voltage falls to 4.2V or less because of the
power turned off or any trouble, IC3-Pin8 turns "L" to reset the
CPU.
The clock signal from the CPU is transmitted to IC3-Pin3 (CK) at a
regular interval to clear the watchdog timer embedded in IC3. How-
ever, if the clock signal from the CPU disappears because of a sys-
tem trouble, IC3-Pin8 turns "L" to reset the CPU and stop the
system operation.
6)
EEPROM Circuit
This circuit consists of the data storage EEPROM and the periph-
eral circuits.
IC4 is a storage memory for the adjustment settings of the reverse
sensor (reflective sensor) and the paper width detection potentiom-
eter, and passes the data to the CPU through the four-wire serial
interface.
Once data is stored, the data is retained and not cleared even if the
power is turned off.
eral circuits.
IC4 is a storage memory for the adjustment settings of the reverse
sensor (reflective sensor) and the paper width detection potentiom-
eter, and passes the data to the CPU through the four-wire serial
interface.
Once data is stored, the data is retained and not cleared even if the
power is turned off.
Not
Mounted
Mounted
Horizontal
T rans port MOT
T rans port MOT
R egis tration C L
F lapper S OL
Not Mounted
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