Read Sharp MX-PNX6 Service Manual online
MX-FN11 OPERATIONAL DESCRIPTION 4 – 17
8. Power supply system
A. Power supply route in finisher
The finisher controller PCB is supplied with two power supply sys-
tems, 13 VDC and 24 VDC, when the host machine is turned on.
The 24 VDC power supply system is intended for drive of the
motors and solenoids. As for the 13 VDC power supply system,
after the power is converted to 5 VDC by the regulator IC (IC28) on
the finisher controller PCB, it is used for drive of the sensors. After
it is converted to 3.3 VDC by the regulator IC(IC7) on the finisher
controller PCB, it is used for drive of the IC in the PCB. Power from
the power supply systems is supplied to the saddle stitcher control-
ler PCB from the finisher controller PCB.
The power is also supplied from the finisher controller PCB to the
saddle stitch controller PCB. In addition, it is also supplied to the
punch controller PCB when the optional punch module is mounted.
Some of the 24 VDC power used to drive motors is cut off when the
front/cover close detector switch (FFDD) is open. Figure shown
below is a block diagram showing the power supply system.
tems, 13 VDC and 24 VDC, when the host machine is turned on.
The 24 VDC power supply system is intended for drive of the
motors and solenoids. As for the 13 VDC power supply system,
after the power is converted to 5 VDC by the regulator IC (IC28) on
the finisher controller PCB, it is used for drive of the sensors. After
it is converted to 3.3 VDC by the regulator IC(IC7) on the finisher
controller PCB, it is used for drive of the IC in the PCB. Power from
the power supply systems is supplied to the saddle stitcher control-
ler PCB from the finisher controller PCB.
The power is also supplied from the finisher controller PCB to the
saddle stitch controller PCB. In addition, it is also supplied to the
punch controller PCB when the optional punch module is mounted.
Some of the 24 VDC power used to drive motors is cut off when the
front/cover close detector switch (FFDD) is open. Figure shown
below is a block diagram showing the power supply system.
B. Protect functions of finisher
The 24 VDC power line used to drive motors and solenoids is
equipped with a fuse or motor driver having overcurrent protector.
equipped with a fuse or motor driver having overcurrent protector.
C. Punch module (option)
(1) Outline
When the host machine is turned on, the punch module is supplied
by the finisher control PCB with 24-V and 5-V power.
The 24-V power is used to drive the motors, while the 5-V power is
used by sensors and the ICs on the punch control PCB.
The 24-V power to the motors will be cut off when the joint switch of
the finisher is open. The following is a block diagram for the power
supply system.
by the finisher control PCB with 24-V and 5-V power.
The 24-V power is used to drive the motors, while the 5-V power is
used by sensors and the ICs on the punch control PCB.
The 24-V power to the motors will be cut off when the joint switch of
the finisher is open. The following is a block diagram for the power
supply system.
(2) Protective mechanisms
The 24-V system used to drive the punch motor is equipped with a
built-in fuse that melts in the presence of overcurrent.
built-in fuse that melts in the presence of overcurrent.
Front cover close
detection switch (FFDD)
Saddle stitcher
controller PCB
Finisher controller PCB
Host
machine
Motor
Motor
Solenoids
Sensor
system
Logic
system
Regulator IC
Regulator IC
(IC28)
(IC7)
Punch controller PCB
(Punch module (optional))
Finisher
control
PCB
Upper door
switch
(FPUDSW)
Front door
switch
(FPFDD)
Punch control PCB
Motor system
Motor system
LED PCB
Sensor system
Logic system
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