Basic Construction; Outline Of The Electrical Circuitry - Canon DADF-J1 Service Manual

1 Basic Construction

1.1 Outline of the Electrical Circuitry

The electrical mechanisms of the DADF are controller by the ADF controller PCB, which
is a microprocessor (CPU).
The CPU interprets input from the sensors and signals from the copier, and generates sig-
nals to drive such DC loads as motors and solenoids according to pre-determined timing of
operation.
CPU
(Q1)
ROM
(IC1)
EEPROM
(IC2)
RAM
(Q4)
D/A
(Q9)
IPC
(Q2)
Copier
COPYRIGHT © 2001 CANON INC.
ADF controller PCB
+24R +5V
Power supply PCB
2000 2000 2000 2000
CHAPTER 2 OPERATIONS AND TIMING
+24V +5R
DC5V
(Q65)
F02-101-01
CANON DADF-J1 REV.0 MAR.2001
Motor
Sensor
Solenoid
Clutch
Original
indicator
LED PCB
Sub tray PCB
Reversal
motor
driver PCB
Belt motor
driver PCB
Motor
Motor
2-1