Sharp AR-F12 (serv.man6) Service Manual ▷ View online
3-1
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
I.
BASIC OPERATION
A.
Outline
The unit “stitches” (2 points) a stack of sheets delivered by the finisher unit and folds it in two for
delivery. All these operations are controlled by the saddle stitch controller PCB in response to com-
mands from the host machine via the finisher unit.
mands from the host machine via the finisher unit.
Finisher unit control system
Control system
Guide plate drive system
Paper positioning plate
drive system
Alignment drive system
Saddle stitch drive system
Delivery drive system
Feed drive system
Paper pushing plate
drive system
Paper folding roller
drive system
Figure 3-101
3-2
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
B.
Electrical Circuitry
The sequence of operations used for the saddle stitch is controlled by the saddle stitch controller
PCB. The saddle stitch controller PCB has a microprocessor. This microprocessor is used to control
the sequence of operations and to handle serial communications with the finisher controller PCB,
driving solenoids and motors in response to the various commands from the finisher controller PCB.
the sequence of operations and to handle serial communications with the finisher controller PCB,
driving solenoids and motors in response to the various commands from the finisher controller 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 controller PCB are as follows:
●
Q1
Controls the sequence of operations.
Controls the sequence of operations.
●
Q2
Contains the sequence program.
Contains the sequence program.
●
Q3
Controls the sequence of operations.
Controls the sequence of operations.
●
Q4
Handles IPC communications.
Handles IPC communications.
Electrical circuitry block diagram
Sensors
Switches
Q1 CPU
Q2
ROM
Q3
RAM
Q4
Communi-
cations IC
Saddle stitch
controller PCB
Motors
Solenoids
Host machine
Finisher controller
PCB
Figure 3-102
3-3
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
C.
Inputs to and Outputs from the Saddle Stitch Controller PCB
1.
Inputs to the Saddle Stitch Controller PCB
Paper folding
motor clock
sensor
motor clock
sensor
Alignment
plate home
position sensor
plate home
position sensor
Paper
positioning
plate home
position sensor
positioning
plate home
position sensor
Tray paper
sensor
sensor
PI7S
J402A
J402
J502
J106-3
-1
-2
-2
PI6S
J100-3
-1
-2
-2
J6-7
-9
-8
-8
J6-4
-6
-5
-5
-3
-1
-2
-1
-3
-2
J202A
J302
J202
-6
-4
-5
-1
-3
-2
-3
-1
-2
-4
-6
-5
PI5S
J101-3
-1
-2
-2
J11-1
-3
-2
-2
PI4S
J102-1
-2
-3
-3
J11-6
-5
-4
-4
PI3S
J103-3
-1
-2
-2
J11-7
-9
-8
-8
-3
J303-1
-2
-1
J203-3
-2
-3
J309-1
-2
-1
J209-3
-2
PI2S
J104-3
-1
-2
-2
J11-10
-12
-11
-11
PI1S
J107-1
-2
-3
-3
J11-15
Saddle stitch controller PCB
When the paper pushing plate
motor is rotating, alternately
between “1” and “0”.
motor is rotating, alternately
between “1” and “0”.
+5V
LUNGECLK
LUNGECLK
When the front door is open,
“0”.
“0”.
+5V
FDR
FDR
When the paper folding motor
is rotating, alternately between
“1” and “0”.
is rotating, alternately between
“1” and “0”.
+5V
FLDCLK
FLDCLK
When the alignment plate is
at home position, “1”.
at home position, “1”.
+5V
JOGHP
JOGHP
When paper is present on the
tray, “1”.
tray, “1”.
+5V
TRYPAR
TRYPAR
When the paper positioning
plate is at the home position
sensor, “1”.
plate is at the home position
sensor, “1”.
+5V
PAPPOS
PAPPOS
When the delivery cover is
open, “0”.
open, “0”.
+5V
EJCVR
EJCVR
-14
-13
-13
Paper pushing
plate motor
clock sensor
plate motor
clock sensor
Front door
open/closed
sensor
open/closed
sensor
Delivery cover
sensor
sensor
Figure 3-103
3-4
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
2.
Inputs to the Saddle Stitch Controller PCB
PI8S
J105-3
-1
-2
-2
-1
-3
-2
-3
-2
-3
-1
-2
-1
-2
J6-1
+5V
When paper is present at the
paper positioning plate, “1”.
paper positioning plate, “1”.
PPOSPAR
-3
-2
-2
J301A
J225
J425
J301
J201
PI9S
J124-3
-1
-2
-2
J10-6
+5V
When the inlet cover is
closed, “1”.
closed, “1”.
INLTCVR
-8
-7
-7
PI11S
J525-3
-1
-2
-2
-2
-4
-3
-4
-3
-3
-1
-2
-1
-2
J9-1
+5V
When paper is present in
the delivery sensor unit, “1”.
the delivery sensor unit, “1”.
DELV
-3
-2
-2
J425
J325
-2
-4
-3
-4
-3
-3
-1
-2
-1
-2
J225
J125
PI12S
J126-3
-1
-2
-2
J9-4
+5V
When the flag of the crescent
roller is at the sensor, “1”.
roller is at the sensor, “1”.
FDRLHP
-6
-5
-5
PI13S
J127-3
-1
-2
-2
J9-7
+5V
When the guide is at home
position, “1”.
position, “1”.
GIDHP
-9
-8
-8
PI14S
J128-3
-1
-2
-2
J9-10
+5V
When the paper pushing plate
is at home position, “1”.
is at home position, “1”.
LUNGEHP
-12
-11
-11
PI15S
J129-3
-1
-2
-2
J9-13
+5V
When the paper pushing plate
is at the leading edge, “1”.
is at the leading edge, “1”.
LUNGETOP
-15
-14
-14
PI16S
J131-3
-1
-2
-2
J13-1
+5V
When the stitch unit is
housed, “0”.
housed, “0”.
STPLHP*
-3
-2
-2
PI17S
J132-3
-1
-2
-2
-1
-3
-2
-3
-2
-4
-2
-3
-2
-3
J13-4
+5V
When paper is present in the
vertical path, “1”.
vertical path, “1”.
When the paper folding roller
is at home position, “0”.
is at home position, “0”.
VPJM
-6
-5
-5
J308A
J308
J208
PI21S
J130-3
-2
-1
-1
J18-1
+5V
PAFLDHP*
PAFLDHP*
-3
-2
-2
Saddle stitch controller PCB
Paper positioning
plate paper sensor
plate paper sensor
Inlet cover sensor
Delivery sensor
Crescent roller
phase sensor
phase sensor
Guide home
position sensor
position sensor
Paper pushing
plate home
position sensor
plate home
position sensor
Paper pushing
plate top position
sensor
plate top position
sensor
Stitch unit IN
sensor
sensor
Vertical path
paper sensor
paper sensor
Paper folding
home position
sensor
home position
sensor
Figure 3-104
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