Canon NP6251 Service Manual page 9

A. Scanning Lamp Assembly.............4-39
1. Removing the Scanning Lamp .4-39
2. Removing the Thermal Fuse....4-41
B. Standard White Plate ....................4-41
C. Pre-Exposure Lamp Unit ...............4-43
1. Removing the Pre-Exposure
Lamp Unit .................................4-43
D. Blanking Exposure Lamp
Assembly .......................................4-44
1. Removing the Blanking
Exposure Lamp Assembly .......4-44
E. Photosensitive Drum .....................4-45
1. Removing the Drum Unit..........4-45
2. Replacing the Drum Heater......4-47
3. Installing the Photosensitive
Drum.........................................4-47
F. Potential Sensor Assembly ...........4-48
1. Removing the Potential
Sensor Assembly .....................4-48
G. Primary Charging Assembly..........4-48
1. Removing the Primary
Charging Assembly ..................4-48
H. Pre-Transfer Charging Assembly ..4-49
1. Removing the Pre-Transfer
Charging Assembly ..................4-49
I. Transfer/Separation Charging
Assembly .......................................4-49
1. Removing the Transfer/
Separation Charging
Assembly ..................................4-49
2. Installing the Transfer/
Separation Charging
Assembly ..................................4-51
J. Charging Wire ...............................4-53
1. Outline ......................................4-53
CHAPTER 5 PICK-UP/FEEDING SYSTEM
I. PICK-UP/FEEDING SYSTEM ............5-1
A. Outline ...........................................5-1
II. CASSETTE PICK-UP .........................5-4
A. Pick-Up Operation .........................5-4
1. Outline ......................................5-5
2. Sequence of Pick-Up
Operations ................................5-5
B. Cassette Lifter Operation ..............5-6
C. Identifying the Size of Copy
Paper in the Cassette....................5-8
1. Outline ......................................5-8
2. Identifying the Size of Copy
Paper ........................................5-8
3. Markings on the Width Guide
Rail ...........................................5-10
4. Paper Size................................5-11
5. Registering Paper Width Basic
Value.........................................5-12
COPYRIGHT © 1997 CANON INC.
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III.
IV.
CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
2. Removing the Wire Cleaner of
the Primary Charging
Assembly ..................................4-53
3. Stringing the Charging Wires ...4-53
4. Stringing the Grid Wire of the
Primary Charging Assembly.....4-56
5. Adjusting the Height of the
Charging Wire ..........................4-58
6. Cleaning the Primary Charging
Assembly Anti-Stray Sheet ......4-59
K. Developing Assembly ....................4-60
1. Removing the Developing
Assembly from the Copier........4-60
2. Removing the Blade Unit .........4-61
3. Installing the Blade ...................4-61
4. Removing the Developing
Cylinder and the Magnetic
Seal ..........................................4-62
5. Cleaning the Developing
Assembly Anti-Stray Sheet ......4-65
L. Hopper Assembly ..........................4-66
1. Removing the Hopper
Assembly from the Copier........4-66
M. Drum Cleaner ................................4-67
1. Construction .............................4-67
2. Removing the Cleaning Blade..4-67
3. Installing the Cleaning Blade....4-68
4. Installing the Side Seal.............4-69
5. Cleaning the Cleaning Side
Scraper .....................................4-70
N. Separation Claw/Separation
Claw Drive Assembly ....................4-71
1. Removing from the Drum Unit .4-71
O. Waste Toner Feeding Assembly....4-72
FRONT PAPER DECK ASSEMBLY......5-13
A. Outline ...........................................5-13
1. Pick-Up Operation ....................5-14
2. Sequence of Pick-Up
Operations ................................5-15
B. Lifter Operation..............................5-16
1. Operation..................................5-16
2. Deck Limit Detection ................5-18
C. Detecting the Presence/Absence
of Paper in the Deck......................5-19
1. Detecting the Presence/
Absence of Paper in the Deck ..5-19
2. Detecting the Size of the Deck..5-19
D. High-Speed Pick-Up ......................5-19
MULTIFEEDER...................................5-20
A. Pick-Up Operation .........................5-20
B. Identifying the Size of Paper in
the Multifeeder...............................5-21
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