Basic Construction; Overview Of The Electrical Circuitry - Canon DADF-M1 Service Manual

2.1 Basic Construction

2.1.1 Overview of the Electrical Circuitry

The machine is not equipped with a controller PCB, and its electrical mechanisms are
controlled by the reader controller PCB, which serves as a CPU (IC1). The CPU interprets
signals from sensors and the host machine to generate signals used to drive DC loads (e.g.,
motor, solenoid) with the help of the CPU (IC9) of the ADF driver PCB.
ADF driver PCB
CPU
(IC9)
communication
FLASH ROM
(IC3)
EEP ROM
(IC4,IC5)
Reader controller PCB
Host machine
+24
Serial
CPU
(IC1)
IRC
(IC2)
+5
5 VDC
power supply
(IC10)
+13V
Power supply PCB
F-2-1
Chapter 2
0002-7181
Sensor
Motor
Solenoid
Clutch
Original
indication
LED PCB
2-1