Read Sharp MX-FN19 / MX-FN20 / MX-PN12 Specification online
MX-FN19 OPERATIONAL DESCRIPTION 6 – 1
MX-FN19
Service Manual
[6] OPERATIONAL DESCRIPTION
1. Basic operation
A. Basic operation of finisher
The finisher is designed to deliver copies arriving from its host
machine, and its modes of delivery include simple stacking, job off-
set, and staple.
All operations involved in these modes are controlled by the fin-
isher controller PCB, according to the appropriate commands from
the host machine.
In the case of the Saddle stitch finisher, copies from the host
machine may be routed to the saddle stitch unit.
machine, and its modes of delivery include simple stacking, job off-
set, and staple.
All operations involved in these modes are controlled by the fin-
isher controller PCB, according to the appropriate commands from
the host machine.
In the case of the Saddle stitch finisher, copies from the host
machine may be routed to the saddle stitch unit.
NOTE: The term job offset refers to shifting each sorting job, sepa-
rating a single stack into several stacks.
B. Outline of electric circuitry in finisher
The finisher's sequence of operation is controlled by the finisher
controller PCB. The finisher controller PCB is a 16-bit microproces-
sor (CPU), and is used for communication with the host machine
(serial) in addition to controlling the finisher's sequence of opera-
tions.
The finisher controller PCB responds to the various commands
coming from the host machine through a serial communications
line to drive solenoids, motors, and other loads. In addition, it com-
municates the finisher's various states (information on sensors and
switches) to the host machine through a serial communications cir-
cuit.
In the case of the Saddle Finisher, the finisher controller PCB not
only communicates with the saddle stitch controller PCB but also
communicates the saddle stitch unit's various states (information
on sensors and switches) to the host machine.
The ICs used on the finisher controller PCB are designed for the
following:
• IC2 (CPU)
controller PCB. The finisher controller PCB is a 16-bit microproces-
sor (CPU), and is used for communication with the host machine
(serial) in addition to controlling the finisher's sequence of opera-
tions.
The finisher controller PCB responds to the various commands
coming from the host machine through a serial communications
line to drive solenoids, motors, and other loads. In addition, it com-
municates the finisher's various states (information on sensors and
switches) to the host machine through a serial communications cir-
cuit.
In the case of the Saddle Finisher, the finisher controller PCB not
only communicates with the saddle stitch controller PCB but also
communicates the saddle stitch unit's various states (information
on sensors and switches) to the host machine.
The ICs used on the finisher controller PCB are designed for the
following:
• IC2 (CPU)
Controls sequence of operations/sequence program built-in.
• IC3 (EEP-ROM)
For backup of adjustment values/backup of default data.
• IC28 (Regulator IC)
Generates 5V.
• IC7 (Regulator IC)
Generates 3.3V.
The figure below shows the flow of signals between the finisher and
the optional controller.
the optional controller.
C. Basic operation of saddle stitcher
The unit "stitches" (2 points) a stack of sheets delivered by the fin-
isher and folds it in two for delivery. All these operations are con-
trolled by the saddle stitch controller PCB in response to
commands from the host machine via the finisher.
isher and folds it in two for delivery. All these operations are con-
trolled by the saddle stitch controller PCB in response to
commands from the host machine via the finisher.
D. Outline of electric circuitry in saddle stitch unit
The sequence of operations used for the saddle stitch unit is con-
trolled by the saddle stitch controller PCB. The saddle stitch con-
troller PCB has a microprocessor. This microprocessor is used to
control the sequence of operations and to handle serial communi-
cations with the finisher controller PCB, driving solenoids and
motors in response to the various commands from the finisher con-
troller PCB.
The saddle stitch controller PCB is also used to communicate the
state of various sensors and switches to the finisher controller PCB
in serial.
The functions of the major ICs mounted on the saddle stitch con-
troller PCB are as follows:
• IC7 (CPU)
trolled by the saddle stitch controller PCB. The saddle stitch con-
troller PCB has a microprocessor. This microprocessor is used to
control the sequence of operations and to handle serial communi-
cations with the finisher controller PCB, driving solenoids and
motors in response to the various commands from the finisher con-
troller PCB.
The saddle stitch controller PCB is also used to communicate the
state of various sensors and switches to the finisher controller PCB
in serial.
The functions of the major ICs mounted on the saddle stitch con-
troller PCB are as follows:
• IC7 (CPU)
Controls sequence of operations/sequence program built-in.
• IC8 (IC)
Communicates with the finisher.
• IC512 (Regulator IC)
Generates 5V.
• IC10 (Regulator IC)
Generates 3.3V.
Tray drive system
Tray drive system
Control
system
Swing guide drive system
Alignment drive system
Stapler drive system
Delivery drive system
Feed drive system
Shutter drive system
Saddle stitch unit control system
Saddle stitch
controller PCB
Punch controller
PCB
(Punch module(option))
Host machine
(DC controller PCB CPU)
Finisher controller
PCB
IC2
CPU
IC3
EEP-ROM
IC28
Regulator IC
IC7
Regulator IC
Motor
Solenoid
Switch
Sensor
Sensor
Finisher control system
Control
system
Guide plate drive system
Paperpositioningplatedrivesystem
Alignment drive system
Saddle stitch drive system
Delivery drive system
Feed drive system
Paper pushing plate
drive system
Paper folding roller
drive system
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