Outline Of Electrical Circuit; Finisher Assembly - Canon SADDLE FINISHER K3 Service Manual

CHAPTER 2 OPERATION OVERVIEW

1.2 Outline of Electrical Circuit

1.2.1 Finisher Assembly

The sequence of operations of the finisher is controlled by the finisher controller PCB,
which is a 16-bit microprocessor (CPU); in addition to controlling the sequence, it commu-
nicates with the host machine in serial.
In response to the various commands from the host machine through the serial communi-
cation line, the finisher controller PCB drives the solenoids and motors. It in turn sends in-
formation about the sensors and the switches to the host machine using the serial communi-
cation line.
The ICs mounted to the finisher controller PCB have the following major functions:
• IC106 (master CPU):
• IC108 (master EEPROM): backs up adjustment values.
• IC110 (master EPROM):
backs up initial settings data
• IC113 (communication IC): communicates with the copier and the saddle stitcher unit
• IC125 (slave CPU):
• IC123 (DPRAM):
F02-102-01 shows the flow of signals between finisher and copier:
2-2
COPYRIGHT© 2001 CANON INC.
controls sequence of operations.
stores sequence programs.
controls sequence of operations.
controls communication between master CPU and slave
CPU.
Finisher unit
Finisher
Copier main
controller PCB
controller
PCB (CPU)
IC106
Master
CPU
IC108
Master
EEPROM
Fuse PCB
IC110
Master
EEPROM
Fan
Saddle Inserter
stitcher drive
controller PCB
PCB
Saddle Inserter
stitcher unit
F02-102-01
2000 2000 2000 2000
Motor
IC113 Switch
Communi
cation IC
Fan
IC108
Punch driver
Slave
PCB
CPU
IC123
Fan
DPRAM
Sensor
Folder
driver
PCB
Folder
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
Solenoid
Sensor
Motor