Power Supply - Canon DADF-B1 Service Manual

CHAPTER 2 BASIC OPERATION
I. Power Supply
The following figure shows an outline of the power supply system.
The ADF is supplied with two channels of 24 V power by the copier. One line (J2) runs through
a circuit breaker (CB1) to reach various loads; the circuit breaker is designed to turn on in response to
an overcurrent threatening the ADF's circuitry. The other line (J1F) caries power which is converted
into 5 V by a regulator (Q17) and is used by logic and sensor systems; a fuse resistor (FU1, FU2) is
provided to cut off the power in response to an overcurrent in the circuit, thereby protecting the
circuit.
24V
J2
24V
J1
Copier
2-50
COPYRIGHT © 1999 CANON INC. CANON DADF-B1 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Fuse resistor
(FU2)
Circuit breaker
(CB1)
Fuse resistor
Logic
(FU1)
Regulator
5V
IC (Q17)
ADF controller PCB
Figure 2-281
Break
Motor
24V
Sensor
5V
5V
Sensor