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MX-FNX1/MX-PNX1  ELECTRICAL SECTION  10 – 5

This circuit controls rotation/stop and the rotating direction of the staple shift motor (FSM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC4). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (ST_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
45, 46, 47, 48pin).
The analog signal (ST_MOT_REF) outputted from the DA converter (IC11-18pin) is divided into a certain voltage with R64 and R65. The
divided voltage is inputted to IC4-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the DA
converter (IC11-7pin) is H when the motor can be operated (READY).

5)

Alignment motor F (FFJM) drive circuit

6)

Alignment motor R (FRJM) drive circuit

This circuit controls rotation/stop and the rotating direction of the alignment motor F (FFJM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC17). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (J1_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
49, 50, 51, 52pin).
The analog signal (J1_MOT_REF) outputted from the DA converter (IC11-19pin) is divided into a certain voltage with R125 and R126. The
divided voltage is inputted to IC17-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the
DA converter (IC11-7pin) is H when the motor can be operated (READY state).
This circuit controls rotation/stop and the rotating direction of the alignment motor R (FRJM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC18). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (J2_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
53, 54, 55, 56pin).
The analog signal (J2_MOT_REF) outputted from the DA converter (IC11-2pin) is divided into a certain voltage with R127 and R128. The
divided voltage is inputted to IC18-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the
DA converter (IC11-7pin) is H when the motor can be operated (READY state).

Alignment motor F (FFJM)

Not
installed

Not installed

Alignment motor R (FRJM)

MX-FNX1/MX-PNX1  ELECTRICAL SECTION  10 – 6

7)

Staple motor (FFSM) drive circuit

This circuit controls rotation/stop and the rotating direction of the staple motor (FFSM), and is composed of the CPU (IC10) and the FET
(Q10, 11, 12, 13). The DC motor is controlled with the staple motor (FFSM) drive normal rotation signal, the reverse rotation signal, and the
brake signal outputted from the CPU (IC10-5, 8, 9pin).
To protect the motor and the mechanism, the current limit circuit is provided, which supplies the motor drive OFF signal when the current
flowing through the detection resistors R78 and R79 exceeds 3.8A, restricting the current not to exceed 3.8A.

8)

Tray motor (FTLM) drive circuit

This circuit controls the tray motor (FTLM) rotation, stop, and
rotating direction, and is composed of the CPU (IC10) and the
DC motor driver IC (IC19). The CPU (IC10-69, 70pin) outputs
the tray motor (FTLM) drive normal rotation signal, the reverse
rotation signal, and the brake signal to control the DC motor. In
addition, the current limiting circuit is formed with R129, R130,
R131, and R132 for the current flowing through the motor not
to exceed 0.65A.

9)

Fan (FFAN) drive circuit

This circuit controls the fan (FFAN) rotation, stop, and rotating
direction, and is composed of the CPU (IC10) and the digital
transistors (Q14, Q18). The DA converter (IC11-13pin) outputs
the fan (FFAN) drive signal to drive the motor. The fan lock sig-
nal is inputted through the noise filter of R168 and C130 to the
CPU (IC10-20pin) by the open drain output of the fan built-in
circuit.
The logic of the signal inputted to the CPU is H when locked.

Staple motor
(FFSM)

Tray motor (FTLM)

Fan (FFAN)

MX-FNX1/MX-PNX1  ELECTRICAL SECTION  10 – 7

This circuit controls attachment and release of the flapper solenoid (FINRPS), the belt separation solenoid (FBRS), the paper surface detection
solenoid (FSLS), and the paddle one-rotation solenoid (FPDS).
The CPU (IC10-24, 26) outputs the drive signal of the flapper solenoid (FINRPS) and the paddle one-rotation solenoid (FPDS) to turn ON Q23
and Q20 to attach the solenoid.
The CPU (IC10-27,28) outputs the drive signal of the belt separation solenoid (FBRS) and paper surface detection solenoid (FSLS) to turn on
Q19 and Q22 to attach the solenoid.
The drive signal of the flapper solenoid (FINRPS) and the paper surface detection solenoid is a PWM signal. After completion of attachment,
the flapper solenoid (FINRPS) duty is 20%. Paper surface detection solenoid (FSLS): Duty is reduced to 50% and the solenoid temperature
rise is reduced to keep attachment.

This circuit generates the reset signal and supplies it to the CPU
when the power is turned ON and when the power voltage fall is
detected.
IC13-6pin (OUT) is normally at HIGH level after turning ON the
power. When, however, +5V power voltage falls to 4.05V or less
because of power OFF or any other reasons, IC13-6pin is driven to
LOW level, resetting the CPU.

This circuit is composed of EEPROM which stores data and the
peripheral circuit.
IC12 is a memory which stores the adjustment values of the inner
punch transmission-type optical sensor and the alignment plate
position, and it sends/receives data to/from the CPU through the 4-
wire type serial interface. The data stored once are kept undeleted
even when the power is turned OFF.
IC12-1pin (CS) is the chip select pin and is at HIGH level when
data are sent or received.
IC12-2pin (SK) is the serial clock pin. Serial data are inputted to
this pin and sent in synchronization with the clock.
IC12-3pin (DI) is the serial data input pin, and IC12-4pin (DO) is the
serial data output pin.

Flapper solenoid
(FINRPS)

Paddle one-rotation
solenoid (FPDS)

Paper surface detection
solenoid (FSLS)

Belt separation solenoid
(FBRS)

Not
installed

MX-FNX1/MX-PNX1  ELECTRICAL SECTION  10 – 8

This circuit limits a rush current flowing through the current-regen-
erating capacitor in the motor drive system to a certain level. It is
composed of the posister (PTH2) which limits a current and the
FET (Q3) which flows a current in the steady state.
From when the front cover switch (FDSW) is closed to when the
cathode voltage of ZD1 reaches the zener voltage by the time con-
stant of R42 and C14, the base current is not supplied to Q1, turn-
ing OFF Q1 and Q3. During this period, a current flows through
PTH2 to charge the current regenerating capacitor.
After the current regenerating capacitor is fully charged, when the
cathode voltage of ZD1 exceeds the zener voltage by the time con-
stant of R42 and C14, the base current is supplied to Q1 to turn ON
Q1 and Q3. The current flowing through PTH2 flows through Q3,
releasing the current limit operation.
The circuit composed of PTH1 and D1 immediately removes elec-
tric charges accumulated in C14 when the front cover switch
(FDSW) is opened. This circuit allows the rush current limit opera-
tion for instantaneous open/close of the cover.

This circuit controls the punch function of paper discharged from
the main unit.
It is composed of circuits which process signals from sensors and
the inner finisher and the circuit which drives the motors.

1)

Full sensor (FPDD)
The full sensor (FPDD) employs the photo interrupter in which
the light emitting diode and the photo transistor are integrated.
The full state is detected by interruption of lights with the light-
shielding plate. By use of Q8, the logic when the connector is
disconnected is made the same as when light is emitted to the
sensor (full).
Signals are inputted through the noise filter of R10 and C2 to
the multiplexer (IC9-4pin).
The logic of a signal inputted to the CPU on the inner finisher
circuit is fixed to H when the punch dust container is full.
R2 is the current limit resistor of the light emitting diode, and
R6 is the load resistor of the sensor.

2)

Punch position sensor (FPHPD)
The punch position sensor (FPHPD) employs the photo inter-
rupter in which the light emitting diode and the photo transistor
are integrated.
The full state is detected by interruption of lights with the light-
shielding plate. By use of Q9, the logic when the connector is
disconnected is made the same as when light is emitted to the
sensor (when punching).
Signals are inputted through the noise filter of RA11.2 and C55
in the inner finisher circuit to the CPU (IC10-87pin).
The logic of a signal inputted to the CPU is fixed to H at the
home position, and L when punching.
R1 is the current limit resistor of the light emitting diode, and
R97 (in the inner finisher circuit) is the load resistor of the sen-
sor.

3)

Rear position sensor (FPRPD)
The rear position sensor (FPRPD) employs the photo inter-
rupter in which the light emitting diode and the photo transistor
are integrated.
The rear position is detected by interruption of lights with the
light-shielding plate.
Signals are inputted through the noise filter of RA11.3 and C56
in the inner finisher circuit to the CPU (IC10-16pin). The logic
of a signal inputted to the CPU is H when light is shielded and
L when light is emitted to the sensor.
R4 is the current limit resistor of the light emitting diode, and
R98 (in the inner finisher circuit) is the load resistor of the sen-
sor.

4)

Horizontal shift HP sensor (FPSHPD)
The horizontal shift HP sensor (FPSHPD) employs the photo
interrupter in which the light emitting diode and the photo tran-
sistor are integrated.
The home position is detected by interruption of lights with the
light-shielding plate.
Signals are inputted through the noise filter of RA11.4 and C57
in the inner finisher circuit to the CPU (IC10-17pin). The logic
of a signal inputted to the CPU is H when light is shielded and
L when light is emitted to the sensor.
R58 is the current limit resistor of the light emitting diode, and
R99 (in the inner finisher circuit) is the load resistor of the sen-
sor.

Main unit

Front cover switch (FDSW)

Full sensor (FPDD)

Punch position sensor (FPHPD)

Rear position sensor (FPRPD)

Horizontal shift HP sensor (FPSHPD)