COPYRIGHT © 1999 CANON INC.
CANON ADF FOR iR600 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
Operations
I . BASIC CONSTRUCTION............. 2-1
A. Electrical Circuitry ................. 2-1
B. Communication with the Copier
.............................................. 2-1
C. Inputs to the ADF Controller PCB
.............................................. 2-2
D. Outputs from the ADF Controller
PCB ....................................... 2-4
II . BASIC OPERATIONS ................. 2-5
A. Outline ................................... 2-5
B. Operations ............................. 2-8
C. Detecting an Original ........... 2-14
D. Original Pickup/Separation.. 2-24
E. Feeding/Delivering Originals
............................................ 2-34
F. CW Rotation Pickup/Delivery
............................................ 2-37
G. Pre-Reversal Pickup/Delivery
............................................ 2-55
H. Reversal Pickup/Delivery .... 2-61
I.
Manual Feeder Pickup/Delivery
............................................ 2-69
III . DETECTING JAMS .................. 2-72
IV . POWER SUPPLY .................... 2-79
1. In outline diagrams,
represents mechanical drive paths,
and
indicates electrical signal paths.
2. Signals in digital circuits are identified as '1' for High and '0' for Low. The
voltage of signals, however depends on the circuit.
Nearly all operations of the machine are contorolled by the CPU; the internal
workings of the CPU are not relevant to the service person's work and, therefore,
are left out of the discussions. By the same token, no repairs are prescribed for the
PCBs at the user's premises; for this reason, PCBs are discussed by means of
block diagrams rather than circuit diagrams.
For the purpose of explanation, discussions are divided into the following: from
sensors to ADF controller PCB input ports; from ADF controller output ports to
loads; and minor control circuits and functions.