Canon DADF-M1 Service Manual - page 23
of
110
Chapter 2
2-1
2.1 Basic Construction
2.1.1 Overview of the Electrical Circuitry
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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.
F-2-1
ADF driver PCB
CPU
(IC9)
5 VDC
power supply
(IC10)
CPU
(IC1)
FLASH ROM
(IC3)
EEP ROM
(IC4,IC5)
IRC
(IC2)
Reader controller PCB
Power supply PCB
Sensor
Original
indication
LED PCB
Motor
Solenoid
Clutch
+13V
+24
+5
Host machine
Serial
communication