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8 Power Supply System
8.1 Finisher/Saddle Assembly
8.1.1 Outline
When the host machine is turned on, it supplies the finisher controller PCB with two
channels of 24 VDC; one is for the motors and clutches, and the other is turned into 5 VDC
by the regulator IC (IC1) of the finisher controller PCB for use by the sensors and ICs on
PCBs.
If a punch unit (option) is installed, power is also supplied to the punch controller PCB.
Some of 24 VDC used to drive motors is cut off when the joint switch (MS2), front door
switch (MS1), or stapler safety switch (MS3) is open.
F02-801-01 is a block diagram of the power supply system:
24VP
Host
machine
24VL
8.1.2 Protective Mechanisms
A circuit breaker (CB1) is monitored to protect the 24 VDC system sued to drive the mo-
tors against overcurrent. The 24-V system used to drive the feed motor (M1), paddle motor
(M2), and delivery motor (M3) is equipped with a fuse which melts in the presence of
overcurrent.
COPYRIGHT © 2001 CANON INC.
Chap02.p65
Front door switch
(MS1)
Joint switch
(MS2)
Circuit Breaker
(CB1)
Finisher
controler PCB
(IC1)
Regurator IC
F02-801-01
2000 2000 2000 2000
CANON SADDLE FINISHER G1 REV.0 MAR. 2001
63
CHAPTER 2 OUTLINE OF OPERATION
Stapler safety switch
(MS3)
24 V
Motor
24 V
Motor
24 V
Clutch
5 V
Sensor
5 V
Logic system
Punch controller PCB
(puncher unit; option)
3/28/01, 12:07 PM
2-63
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