MX-FN21, MX-FN22, MX-PN13 (serv.man3). Service Manual (Revised February 2017). - Sharp Copying Equipment Service Manual (repair manual). Page 13

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TECHNICAL DESCRIPTIONS > Basic Composition

TECHNICAL DESCRIPTIONS > Basic Composition

Outline of electrical circuits

The operation sequence of this machine is controlled by the finisher controller PWB, which 
uses the 16bit CPU for sequence control. It also performs communication between the 
machine body and the optional punch unit.
The CPU on the finisher controller PWB is provided with a ROM which stores the operation 
sequence program.
The finisher controller PWB drives the motors, the clutches and the solenoids according 
to the various commands sent from the machine body via the communication cable. In 
addition, it notifies information on the sensors and switches to the machine body via the 
communication cable.

• 

Finisher

Finisher 
controller PWB

Motor

Fan

Clutch

Solenoid

Sensor

Switch

Punch unit 
controller PWB

(OP)

CPU

Motor

driver

Inserter 
controller PWB

GBC punch 
controller PWB

Decurler  
controller PWB

Paper folding unit 
controller PWB

F-2-3

• 

Saddle finisher

(OP)

CPU

CPU

Finisher 
controller PWB

Motor

Motor

Fan

Clutch

Solenoid

Sensor

Solenoid

Sensor

Switch

Punch unit 
controller PWB

Inner trimmer 
controller PWB

Inserter 
controller PWB

GBC punch 
controller PWB

Decurler 
controller PWB

Paper folding unit 
controller PWB

Motor
driver

Motor
driver

Saddle stitcher 
controller PWB

(OP)