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CHAPTER 2 BASIC OPERATION
VIII.
POWER SUPPLY
1.
Outline
When the copier is turned on, it supplies the finisher controller PCB with two channels of 24
VDC: one is for driving the motors, and the other is used by the regulator IC (Q8) on the finisher
controller PCB to generate 5 VDC for sensors and ICs on PCB.
The 24 VDC power used to drive the staple motor is cut when the stapler safety switch (S14)
opens.
Figure 2-801 is a block diagram showing the distribution of power.
24VP
Copier
24VL
2.
Protection Mechanism
The finisher is equipped with a circuit breaker (CB1) designed to protect against overcurrent,
cutting off 24 VDC to the motor.
2-58
Finisher controller PCB
Circuit
breaker
CB1
Regulator
IC (Q8)
Figure 2-801
COPYRIGHT © 1999 CANON INC.
24V
Staple unit
drive circuit
5V
Logic
CANON FINISHER-E1 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Motor
M
N.O.
Staple safety
switch S14
Stapler motor
M6
Sensor
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