MX-5500N, MX-6200N, MX-7000N (serv.man17). MX-FNX3 4 MX-RBX2 MXPNX2A-D SERVICE MANUAL-Operational Description - Sharp Copying Equipment Peripheral (repair manual). Page 2

MX-FNX4  OPERATIONAL DESCRIPTION  5 – 2

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.

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)

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.

Inputs to and outputs from the punch control PCB

Outputs from the punch control PCB

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

Sensor

Switch

Saddle stitch

controller PCB

IC7 CPU

IC512

Regulator IC

IC10

Regulator IC

IC8

IC

Finisher controller

PCB

Host machine

Motor

Solenoid

Punch motor

lock sensor

When the punch slide

unit is at home position,

'1'.

While the punch motor

is rotating,alternates

between '0' and '1'.

Waste full PCB(FPDD)

When the light is

blocked,'0'.

When paper is

detected,'0'.

FPFDD

FPUDSW

Punch

front door

Punch

upper cover

J602-1

-3

J622-1

-2

J621-1

-2

-4

-6

FRONT COVER

+24V

UP COVER

+24V

FPHPD

FPSHPD

FPE

J613-1

-2

-3

J611-1

-2

-3

J612-1

-2

-3

J605-A3

-A2

-A1

J605-A7

-A9

-A8

J605-A6

-A5

-A4

J606-1

-2

-3

-4

J618-4

-3

-2

-1

J605-B6

-B5

-B4

-B3

-B2

-B1

-B7

J615-2

-3

-4

-5

-6

-7

-1

+5V

PUNCH

+5V

SLIDE

+5V

CLOCK

SREG1*

SREG2*

SREG3*

SREG4*

PAEND*

DUSTLED

DUSTPTR

+5V

+5V

+5V

PT1

PT131

LED121

PT2

PT3

PT4

PT5

Punch home

position sensor

Horizontal

registration

home position

sensor

Punch control PCB

When the hole puncher is

at home position,'0'.

Horizontal registration photosensor PCB (FPTD)

J604-1

-2

-3

-4

J619-6

-4

-3

-1

A*

A

B

B*

FPNM

FPSM

FSIFM

J605-B13

-B8

-B9

-B10

-B11

-B12

J614-1

-6

-5

-4

-3

-2

J603-1

-2

J620-1

-2

J605-A10

-A11

-A12

-A13

J610-1

-2

-3

-4

J610-4

-3

-2

-1

A

B

A*

B*

LEDON5

LEDON4

LEDON3

LEDON2

LEDON1

+5V

LED5

LED4

LED3

LED2

LED1

Horizontal registration LED PCB (FPSD)

Punch control PCB

When '1',LED goes ON.

Punch motor

Punch horizontal registration motor

Punch transport motor

Switches between '+' and '-'

according to the direction of

motor rotation.

Switches the pulse

signals according to

the rotation of the motor.

Switches the pulse

signals according to

the rotation of the motor.