Specifications

COPYRIGHT © 2001 CANON INC. CANON DADF-J1 REV.0 MAR. 2001
iv
INTRODUCTION
Contents
CHAPTER 1 GENERAL DESCRIPTION
1 Features ............................................... 1-1
2 Specifications ...................................... 1-2
2.1 DADF-J1....................................... 1-2
3 Names of Parts..................................... 1-4
3.1 External View................................ 1-4
3.2 Cross Section ................................ 1-5
4 Using the DADF .................................. 1-6
4.1 Original Set Indicator ................... 1-6
4.2 Warnings and Action to Take ........ 1-6
4.3 Routine Maintenance by the User 1-7
CHAPTER 2 OPERATIONS AND TIMING
1 Basic Construction .............................. 2-1
1.1 Outline of the Electrical
Circuitry ..................................... 2-1
1.2 Communication with the Copier .. 2-2
1.3 Inputs to the ADF
Controller PCB .......................... 2-3
1.4 Outputs from the ADF Controller
PCB ............................................ 2-5
2 Basic Operations.................................. 2-6
2.1 Outline .......................................... 2-6
2.2 Operations ..................................... 2-9
2.2.1 Outline ..................................... 2-9
2.2.2 CW Pickup/Delivery ............. 2-10
2.2.3 Pre-Reversal/Reversal/Delivery
(small-size original) ........... 2-11
2.2.4 Reversal Pickup/Reversal/Delivery
(large-size originals) .......... 2-13
2.2.5 Manual Feeder Pickup/Delivery
........................................... 2-15
2.3 Detecting Originals ..................... 2-16
2.3.1 Outline ................................... 2-16
2.3.2 Detecting the Presence/Absence
of an Original ..................... 2-17
2.3.3 Original Size Detection 1 ...... 2-18
2.3.4 Original Size Detection 2 ...... 2-19
2.3.5 Pre-Last Original Detection .. 2-24
2.3.6 Detecting the Presence/Absence
of an Original in the Manual
Feeder ................................ 2-25
2.4 Picking Up and Separating Originals
................................................. 2-26
2.4.1 Outline ................................... 2-26
2.4.2 Moving Up/Down the Pickup
Roller Unit ......................... 2-27
2.4.3 Switching the Separation Pressure
........................................... 2-30
2.4.4 Separation Sensor (S4) and Skew
Sensor (S5) ........................ 2-31
2.4.5 Controlling the Pickup Motor
(M3) ................................... 2-33
2.4.6 Controlling the Separation Motor
(M4) ................................... 2-34
2.4.7 Sequence of Operations ........ 2-35
2.5 Moving/Delivering Originals...... 2-36
2.5.1 Outline ................................... 2-36
2.5.2 Controlling the Belt Motor
(M2) ................................... 2-37
2.5.3 Controlling the Delivery Motor
(M5) ................................... 2-39
2.6 CW Pickup/Delivery ................... 2-40
2.6.1 Outline ................................... 2-40
2.6.2 Fixed Reading ....................... 2-40
2.6.3 Stream Reading ..................... 2-48
2.7 Pre-Reversal Pickup/Delivery..... 2-57
2.7.1 Outline ................................... 2-57
2.7.2 Operations ............................. 2-57