B Basic Construction - Canon NP6512 Service Manual

CHAPTER 8 ADF
B Basic Construction
1. Outline of the Electric Circuitry
The ADF's major electrical mechanisms are controlled by the CPU on the ADF controller
PCB.
The CPU on the ADF controller PCB reads the signals from the sensors and the copier and
generates signals to drive the motor at such times as programmed in advance.
The copying modes selected on the copier are communicated to the ADF in serial, and the ADF
communicates to the copier the state of feeding originals to the copier in serial. (It does not use an
IC for communications.)
[Input block]
Sensor
Switch
8-2
COPYRIGHT © 1999 CANON INC.
ADFcontroller PCB
ROM
(Q2)
Serial communication
Copier
Figure 8-102
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
[Control block]
CPU
(Q1)
24V 5V
Composite
power
supply
PCB
[Output block]
Motor