Filter
Top Products
COPYRIGHT © 1997 CANON INC. CANON NP6218 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
x
CHAPTER 10 TROUBLESHOOTING
I. MAINTENANCE AND INSPECTION..10-3
A. Image Adjustment Basic
Procedure....................................10-3
B. Periodical Servicing.....................10-4
II. STANDARDS AND ADJUSTMENTS..10-5
A. Image Adjustment .......................10-5
1. Adjusting the Image Leading
Edge Margin ([3], No.305;
registration ON timing) ...........10-5
2. Adjusting the Leading Edge
Non-Image Width ([3], No.
306; blank shutter ON
timing).....................................10-6
3. Adjusting the Image Trailling
Edge Non-Image Width ([3],
No.309; blank shutter
timing).....................................10-7
4. Adjusting the Left/Right
Registration ............................10-8
5. Adjusting the Left/Right Margin
(No.311; left/right margin).......10-9
6. Adjusting the Scanning Lamp
Intensity..................................10-10
7. AE Adjustment .......................10-11
B. Exposure System ........................10-15
1. Routing the Scanner Drive
Cable......................................10-15
2. Adjusting the Mirror Position
optical distance between No.1
mirror and No.2/No.3 mirror) ..10-16
3. Adjusting the Scanner Cable
Tension...................................10-17
4. Assembling the Mirror
Positioning Tool ......................10-17
5. Points to Note When Attaching
the Fluorescent Lamp Heater/
Scanning Lamp ......................10-18
6. Positioning the Change
Solenoid .................................10-20
C. Image Formation System ............10-21
1. Positioning the Blank Shutter
Solenoid .................................10-21
2. Routing the Blank Shutter
Cable......................................10-22
3. Positioning the Solenoid for the
Primary Charging Roller.........10-22
4. After Replacing the Drum
Unit.........................................10-23
5. Attaching the Drum Heater ....10-23
D. Pick-Up/Feeding System.............10-25
1. Orientation of the Pick-Up
Roller......................................10-25
2. Orientation of the Multifeeder
Pick-up Roller.........................10-25
3. Positioning the paper Guide
Plate Cam (multifeeder) .........10-26
E. Fixing System..............................10-27
1. Points to Note when Attaching
the Fixing Film........................10-27
2. Points to Note when Attaching
the Heater Connector.............10-27
3. Adjusting the Fixing Film Drive
Roller Pressure ......................10-28
4. Points to Note after Replacing
the Fixing Upper Unit .............10-29
5. Adjusting the Nip....................10-30
6. Routing the Drive Belt ............10-31
7. Storing the Fixing Heater
Registance .............................10-31
8. Setting the Fixing Heater
Temperature Control Value.....10-32
F. Electrical......................................10-35
1. After Replacing the PCB ........10-35
2. Clearing the Back-Up RAM....10-35
3. Checking the
Photointerrupters....................10-36
4. Adjusting the Multifeeder
Paper width Sensor................10-43
5. Setting the Paper Size for the
Universal Cassette .................10-44
III. TROUBLESHOOTING IMAGE
FAULTS.............................................10-45
A. Initial Checks...............................10-45
1. Site Environment....................10-45
2. Checking the Originals...........10-45
3. Checking the Copyboard
Cover and the Copyboard
Glass ......................................10-45
4. Checking the Paper................10-45
5. Others.....................................10-46
B. Samples of Image Faults.............10-48
C. Troubleshooting Faulty Images....10-49
1. The copy is too light
(half-tone only). ......................10-49
2. The copy is too light
(black solid also).....................10-50
3. The copy is too light
(overall, extremely).................10-50
4. The copy has uneven density
(front too dark)........................10-52
5. The copy has uneven density
(front too light)........................10-52
6. The copy is foggy (overall). ....10-53
7. The copy is foggy (vertical). ...10-54
8. The copy has black lines
(vertical; thick fuzzy lines). .....10-54
9. The copy has black lines
(vertical, fine)..........................10-54