Canon Image Reader-A1 iR5000i Service Manual page 184

CONTENTS
CHAPTER 5 PICK-UP/FEEDING SYSTEM
1. Outline ............................................ 5-1P
1.1 Specifications and
Construction ............................. 5-1P
1.2 Arrangement of Roller and
Sensors ..................................... 5-2P
2. Pickup Assembly ............................ 5-4P
2.1 Pickup Control System ............. 5-4P
2.1.1 Outline ............................... 5-6P
2.1.2 Sequence of Operations
(pickup) .............................. 5-7P
2.1.3 Pickup Retry Operation ...... 5-9P
2.2 Lifter Movement ..................... 5-11P
2.2.1 Outline ............................. 5-11P
2.2.2 Lifter Limiter Control Circuit
(right/left deck) ................ 5-13P
2.2.3 Detecting the Presence/
Absence of Paper ............. 5-14P
2.2.4 Detecting the Level of
Paper ................................ 5-14P
2.3 Identifying the Size of Paper
in the Cassette ......................... 5-17P
2.3.1 Right/Left Deck ................ 5-17P
2.3.2 Cassette 3/4 ...................... 5-17P
2.3.3 Markings on the Width
Guide Rail ........................ 5-19P
2.3.4 Paper Sizes ....................... 5-20P
2.4 Manual Feed Tray Pickup
Assembly ............................... 5-23P
2.4.1 Pickup Operation ............. 5-23P
2.4.2 Detecting the Size of Paper on
the Manual Feed Tray ...... 5-24P
3. Controlling the Registration
Clutch ........................................... 5-25P
3.1 Outline .................................... 5-25P
3.2 Control System ....................... 5-25P
4. Double-Sided Prints ..................... 5-26P
4.1 Control System ....................... 5-26P
4.1.1 Sending Paper to the Reversing
Assembly After Printing on the
First Side .......................... 5-26P
P 4
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4.1.2 Sending Paper from the Revers-
ing Assembly to the Duplexing/
Feeding Assembly ........... 5-27P
4.1.3 Outline ............................. 5-28P
4.2 Sequence of Operations
(printing) ................................ 5-29P
4.3 Through-Path Operation ......... 5-30P
4.3.1 Outline ............................. 5-30P
4.3.2 Outline of Operations ....... 5-31P
4.4 Detecting Horizontal
Registration Position .............. 5-35P
4.4.1 Outline ............................. 5-35P
4.4.2 Operation ......................... 5-36P
5. Controlling the Pickup Assembly . 5-37P
5.1 Pickup Assembly Motors ....... 5-37P
6. Controlling the Delivery
Assembly ...................................... 5-38P
6.1 Reversal Delivery Operation .... 5-38P
7. Controlling the Cassette Heater ..... 5-40P
8. Detecting Jams .............................. 5-42P
8.1 Outline .................................... 5-42P
8.1.1 Arrangement of Jam
Sensors ............................ 5-42P
8.1.2 Types of Jams .................. 5-43P
8.2 Sequence of Operations
(jam detection) ...................... 5-44P
8.2.1 Delay Jam ........................ 5-44P
8.2.2 Stationary Jams ................ 5-46P
8.2.3 Jam History ...................... 5-47P
9. Disassembly and Assembly .......... 5-48P
9.1 Manual Feed Tray Assembly ... 5-49P
9.1.1 Removing the Right
Upper Cover .................... 5-49P
9.1.2 Opening of the Right
Upper Cover .................... 5-49P
9.1.3 Removing the Manual Feed
Pull-Out Roller Unit ........ 5-50P
9.1.4 Removing the Feeding
Roller ............................... 5-50P
9.1.5 Removing the Separation
Roller ............................... 5-50P
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001