Canon NP6251 Service Manual page 15

CHAPTER 11 TROUBLESHOOTING
I. MAINTENANCE AND INSPECTION.11-3
A. Image Adjustment Basic
Procedure....................................11-3
B. Points to Note for Scheduled
Servicing......................................11-4
II. STANDARDS/ADJUSTMENTS ........11-5
A. Image Adjustment .......................11-5
1. Adjusting the Image Leading
Edge Margin...........................11-5
2. Adjusting the Image Leading
Edge Non-Image Width
(registration) ...........................11-5
3. Adjusting the Left/Right
Registration (left/right front
deck paper deck, cassette) ....11-6
3-1. Adjusting the Left/Right
Registration (paper deck-A1)..11-7
4. Adjusting the Left/Right
Registration (holding tray
position; 2nd side of two-
sided/overlay copies) .............11-8
5. Adjusting the Left/Right
Margin ....................................11-8
6. Executing AE Automatic
Adjustment .............................11-9
7. Adjusting the AE Slope ..........11-10
B. Exposure System ........................11-11
1. Adjusting the Scanner Home
Position...................................11-11
2. Routing the Scanner Drive
Cable ......................................11-12
3. Orientation of the Heat
Absorbing Glass.....................11-13
4. Adjusting the Tension of the
Scanning Lamp Cable............11-13
5. Adjusting the Position of the
Mirror ......................................11-14
6. Cleaning the Mirror (No. 5
mirror).....................................11-15
7. Routing the Light-Blocking
Belt .........................................11-15
8. Routing the Lens X Direction
Drive Belt................................11-16
9. Adjusting the Position of the
Scanner Locking Solenoid
(SL1).......................................11-16
C. Image Formation System ............11-17
1. Grid Wire of the Primary
Charging Assembly ................11-17
2. Adjusting the Height of the
Charging Wire ........................11-19
3. Adjusting the Position of the
Blanking Exposure Lamp .......11-20
4. Position of the Roller
Electrode ................................11-21
COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
5. Adjusting the Position of the
Cleaning Assembly Side
Seal ........................................11-21
6. Cleaning the Cleaner Side
Scraper...................................11-22
D. Pick-Up/Feeding System.............11-24
1. Orientation of the Cassette/
Front Paper Deck Pick-Up
Roller ......................................11-24
2. Orientation of the Cassette/
Front Paper Deck Separation
Roller ......................................11-25
3. Orientation of the Feeding
Roller (cassette/ front paper
deck).......................................11-25
4. Orientation of the Multifeeder
Pick-Up Roller ........................11-26
4-1. Orientation of the Paper
Deck-A1 Pick-Up Roller .........11-26
5. Rotation of the Multifeeder
Feeding Roller........................11-27
5-1. Orientation of the Paper
Deck-A1 Feeding Roller .........11-27
6. Adjusting the Separation
Roller Pressure of the
Cassette/Front Paper Deck....11-28
7. Adjusting the Separation
Roller Pressure of the
Holding Tray ...........................11-29
8. Pick-Up/Feeding Roller of
the Multifeeder .......................11-29
9. Adjusting the Position of the
Pick-Up Roller Releasing
Solenoid (cassette) ................11-30
9-1. Adjusting the Position of the
Pick-Up Roller Releasing
Solenoid (front paper deck)....11-31
9-2. Adjusting the Position of the
Pick-Up Roller Releasing
Solenoid (paper deck-A1) ......11-31
10.Adjusting the Position of the
Pick-Up Roller Releasing
Solenoid (multifeeder) ............11-32
11. Routing the Timing Belt of the
Side Guide (multifeeder
assembly) ...............................11-33
12.Adjusting the Position of the
Solenoid (delivery paper
deflecting plate solenoid) .......11-33
13.Adjusting the Position of the
Holding Tray Paper Deflecting
Plate Drive Solenoid...............11-34
14.Adjusting the Position of the
Holding Tray Assembly Side
Guide Plate ............................11-34
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