Read Sharp MX-PNX1C (serv.man12) Service Manual 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
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