Sharp MX-PNX1A (serv.man2) Service Manual ▷ View online
MX-FNX1/MX-PNX1 ELECTRICAL SECTION 10 – 3
14) Alignment plate position sensor (FJPD)
The alignment plate position sensor (FJPD) employs the photo
interrupter in which the light emitting diode and the photo tran-
sistor are integrated.
The alignment plate position is detected by interruption of
lights with the lever-type actuator.
Signals are inputted to the multi-plexer (IC14-12pin) through
the noise filter of RA4.1 and C58.
The logic of the signal inputted to the CPU is L when the paper
rear edge stopper is provided at the opening of the stapler.
R103 is the current-limiting resistor of the light emitting diode.
R104 is the load resistor of the sensor.
interrupter in which the light emitting diode and the photo tran-
sistor are integrated.
The alignment plate position is detected by interruption of
lights with the lever-type actuator.
Signals are inputted to the multi-plexer (IC14-12pin) through
the noise filter of RA4.1 and C58.
The logic of the signal inputted to the CPU is L when the paper
rear edge stopper is provided at the opening of the stapler.
R103 is the current-limiting resistor of the light emitting diode.
R104 is the load resistor of the sensor.
15) Stapler home sensor (FSHPD)
The stapler home sensor (FSHPD) is the built-in sensor of the
stapler unit.
The home position is detected by the open-collector output
with the circuit in the unit.
Signals are inputted to the multi-plexer (IC14-1pin) through the
noise filter of RA4.4 and C59.
The logic of the signal inputted to the CPU is H at the stapler
mechanism home position.
stapler unit.
The home position is detected by the open-collector output
with the circuit in the unit.
Signals are inputted to the multi-plexer (IC14-1pin) through the
noise filter of RA4.4 and C59.
The logic of the signal inputted to the CPU is H at the stapler
mechanism home position.
16) Self priming sensor (FSTD)
The self priming sensor (FSTD) is the built-in sensor of the sta-
pler unit.
Self priming is detected by the open-collector output with the
circuit in the unit.
Signals are inputted to the multi-plexer (IC14-5pin) through the
noise filter of RA4.2 and C60.
The logic of the signal inputted to the CPU is H in the READY
state.
pler unit.
Self priming is detected by the open-collector output with the
circuit in the unit.
Signals are inputted to the multi-plexer (IC14-5pin) through the
noise filter of RA4.2 and C60.
The logic of the signal inputted to the CPU is H in the READY
state.
17) Staple empty sensor (FSD)
The staple empty sensor (FSD) is the built-in sensor of the sta-
pler unit.
Staple empty is detected by the open-collector output with the
circuit in the unit.
Signals are inputted to the multi-plexer (IC14-2pin) through the
noise filter of RA4.3 and C61.
The logic of the signal inputted to the CPU is L in case of sta-
ple empty.
pler unit.
Staple empty is detected by the open-collector output with the
circuit in the unit.
Signals are inputted to the multi-plexer (IC14-2pin) through the
noise filter of RA4.3 and C61.
The logic of the signal inputted to the CPU is L in case of sta-
ple empty.
18) Front cover switch (FDSW)
The front cover switch (FDSW) employs a micro switch to
detect open/close of the front cover.
This switch is provided with +24V. By opening the open/close
section, the contact is opened to function as a switch.
When the switch is turned ON, +24V is applied to the cathode
of ZD2, supplying a base current to Q2 to turn ON Q2. Then
open/close signal is inputted to the CPU (IC10-19pin). This
signal is commonly used with the inner punch +5V supply sig-
nal.
The logic of the signal inputted to the CPU is H when the front
cover is open, and L when the front cover is close.
detect open/close of the front cover.
This switch is provided with +24V. By opening the open/close
section, the contact is opened to function as a switch.
When the switch is turned ON, +24V is applied to the cathode
of ZD2, supplying a base current to Q2 to turn ON Q2. Then
open/close signal is inputted to the CPU (IC10-19pin). This
signal is commonly used with the inner punch +5V supply sig-
nal.
The logic of the signal inputted to the CPU is H when the front
cover is open, and L when the front cover is close.
c. Motor drive circuit
1)
1)
Transport motor (FRM) drive circuit
This circuit controls rotation, stop, rotating direction, and current of the transport motor (FRM), and is composed of the CPU (IC10), the DA
converter (IC11), and the constant-current chopper system driver IC (IC5). The motor rotating speed is controlled with the stepping motor
drive signal (R_MOT_CLK) outputted from the CPU (IC10-22pin), and the motor rotating direction is controlled with the signal
(R_MOT_CW/CCW) outputted from the CPU (IC10-21pin).
The analog signal (R_MOT_REF) outputted from the DA converter (IC11-3pin) is divided into a certain voltage with R70 and R71. The
divided voltage is inputted to IC5-7pin to set the motor current value.
converter (IC11), and the constant-current chopper system driver IC (IC5). The motor rotating speed is controlled with the stepping motor
drive signal (R_MOT_CLK) outputted from the CPU (IC10-22pin), and the motor rotating direction is controlled with the signal
(R_MOT_CW/CCW) outputted from the CPU (IC10-21pin).
The analog signal (R_MOT_REF) outputted from the DA converter (IC11-3pin) is divided into a certain voltage with R70 and R71. The
divided voltage is inputted to IC5-7pin to set the motor current value.
Alignment plate position sensor
(FJPD)
(FJPD)
Stapler
Stapler home sensor
(FSHPD)
(FSHPD)
Transport motor
(FRM)
(FRM)
Not installed
MX-FNX1/MX-PNX1 ELECTRICAL SECTION 10 – 4
2)
Bundle exit motor (FAM) drive circuit
This circuit controls rotation/stop rotating direction and current of the bundle exit motor (FAM), and is composed of the CPU (IC10), the DA
converter (IC11), and the constant-current chopper system driver IC (IC8). The motor rotating speed and the rotting direction are controlled
with the stepping motor drive excitement pattern signal (T_MOT_A, *A, B, *B) outputted from the CPU (IC10-79, 80, 81, 82pin).
The analog signal (T_MOT_REF) outputted from the DA converter (IC11-5pin) is divided into a certain voltage with R74 and R75. The
divided voltage is inputted to IC8-3, 14 pin to set the motor current value.
This circuit controls rotation/stop rotating direction and current of the bundle exit motor (FAM), and is composed of the CPU (IC10), the DA
converter (IC11), and the constant-current chopper system driver IC (IC8). The motor rotating speed and the rotting direction are controlled
with the stepping motor drive excitement pattern signal (T_MOT_A, *A, B, *B) outputted from the CPU (IC10-79, 80, 81, 82pin).
The analog signal (T_MOT_REF) outputted from the DA converter (IC11-5pin) is divided into a certain voltage with R74 and R75. The
divided voltage is inputted to IC8-3, 14 pin to set the motor current value.
3)
Roller up/down motor (FSWM) drive circuit
This circuit controls rotation/stop and the rotating direction of the roller up/down motor (FSWM) and the motor current, and is composed of
the CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC16). The motor rotating speed and the
rotating direction are controlled with the stepping motor drive excitement pattern signal (RO_MOT_A, *A, B, *B) outputted from the CPU
(IC10-75, 76, 77, 78pin).
The analog signal (RO_MOT_REF) outputted from the DA converter (IC11-4pin) is divided into a certain voltage with R90 and R114. The
divided voltage is inputted to IC16-3, 14pin to set the motor current value.
This circuit controls rotation/stop and the rotating direction of the roller up/down motor (FSWM) and the motor current, and is composed of
the CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC16). The motor rotating speed and the
rotating direction are controlled with the stepping motor drive excitement pattern signal (RO_MOT_A, *A, B, *B) outputted from the CPU
(IC10-75, 76, 77, 78pin).
The analog signal (RO_MOT_REF) outputted from the DA converter (IC11-4pin) is divided into a certain voltage with R90 and R114. The
divided voltage is inputted to IC16-3, 14pin to set the motor current value.
4)
Staple shift motor (FSM) drive circuit
Bundle exit motor (FAM)
Not installed
Roller up/down motor (FSWM)
Not installed
Staple shift motor (FSM)
Not installed
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).
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).
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
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.
(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.
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.
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)
(FFSM)
Tray motor (FTLM)
Fan (FFAN)
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