Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 7
PICK-UP / FEEDING SYSTEM
In this chapter, the operation, purpose and function of the unit’s paper feeding, from
pick-up to delivery, as well as the relationship between the electrical system and the
mechanical system is summarized. An overview of each part’s operation timing is also
included.
This chapter contains illustrations of the main unit with an automatic document feed-
er installed.
Refer to the ADF service manual, which is included in this manual, for details regard-
ing the construction of the automatic document feeder.
I. OVERVIEW..............................................7-1
A. Construction Overveiw.......................7-1
II. PICK-UP FEEDING OPERATION ...........7-2
A. Overveiw ............................................7-2
III. CASSETTE PICK-UP MECHANISM........7-3
A. Pick-up oparation ...............................7-3
B. Retry pick-up......................................7-5
C. Paper size detection ..........................7-6
IV. MULTI-FEEDER PICK-UP.......................7-7
A. Overview ............................................7-7
B. Multi-feeder pick-up mechanism ........7-8
C. Multi-feeder retry pick-up ...................7-9
D. Multi-feeder paper size setting.........7-10
V. PAPER FEEDING OPERATION............7-12
A. Paper leading edge detection ..........7-12
B. Paper width detection ......................7-12
VI. JAM DETECTION ..................................7-13
A. Overview ..........................................7-13
B. Types of Jam ...................................7-14
C. Jam sequence..................................7-14
VII. DISASSEMBLY, ASSEMBLY ................7-23
A. Cassette feeding assembly..............7-24
B. Multi-feeder assembly......................7-30
C. Registration roller assembly.............7-33
D. Feeder assembly .............................7-35
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