Canon NP6251 Service Manual page 16

15.Adjusting the Position of the
Holding Tray Paper Jogging
Plate .......................................11-35
16.Adjusting the Timing Belt of
the Holding Tray Paper
Jogging Guide Plate...............11-35
17.Adjusting the Position of the
Holding Tray Paper Jogging
Plate Solenoid ........................11-36
18.Drive Belt................................11-36
E. Fixing System..............................11-38
1. Points to Note When Installing
the Fixing Heater....................11-38
2. Adjusting the Position of the
Fixing Assembly Inlet
Guide......................................11-38
3. Adjusting the Lower Roller
Pressure (nip).........................11-40
4. Adjusting the Fixing Clutch ....11-41
F. Electrical System.........................11-42
1. When Replacing the DC
Controller PCB .......................11-42
2. Checking the Surface
Potential Control System........11-42
3. Checking the Potential
System ...................................11-47
4. Potential Control System
Conversion Table ...................11-49
5. Checking the Environment
Sensor ....................................11-54
6. Checking the
Photointerrupters....................11-55
7. Registering the Paper Width
Basic Value (
multifeeder) ............................11-63
III. IMAGE FAULTS................................11-64
A. Initial Checks ...............................11-64
1. Checking the Site
Environment ...........................11-64
2. Checking the Originals ...........11-64
3. Checking the Copyboard
Cover, Copyboard Glass, and
Standard White Plate .............11-65
4. Checking the Charging
Assemblies .............................11-65
5. Checking the Developing
Assembly................................11-65
6. Checking the Paper................11-65
7. Checking the Periodically
Replaced Parts.......................11-65
8. Others.....................................11-65
B. Sample Image Faults ..................11-68
C. Troubleshooting Image Faults.....11-69
1. The copy is too light
(halftone only). .......................11-69
2. The copy is too light (including
solid black). ............................11-70
3. The copy is too light
(entire face). ...........................11-70
xiv
COPYRIGHT © 1997 CANON INC.
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CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
4. The copy has an uneven
density (darker at front)..........11-72
5. The copy has an uneven
density (lighter at front). .........11-72
6. The copy is foggy. (overall). ...11-73
7. The copy has vertical
fogging....................................11-74
8. The copy has black lines
(vertical, fuzzy, thick)..............11-74
9. The copy has black lines
(vertical, fine)..........................11-75
10.The copy has white spots
(vertical)..................................11-76
11. The copy has white lines
(vertical)..................................11-76
12.The copy has white spots
(horizontal). ............................11-78
13.The copy has a soiled back. ..11-79
14.The copy has fixing faults. .....11-80
15., 16., 17. The copy has
displaced leading edge
registration.............................. 11-81
18.The copy is blurred and
fuzzy. ......................................11-82
19.The copy has horizontal
fogging....................................11-83
20.The copy has poor
sharpness...............................11-83
21.The copy is blank. ..................11-84
22.The copy is solid black...........11-84
IV. TROUBLESHOOTING
MALFUNCTIONS .............................11-85
A. Troubleshooting Malfunctions .....11-85
1. E000 .......................................11-85
2. E001 .......................................11-86
3. E002 .......................................11-87
4. E003 .......................................11-87
5. E004 .......................................11-87
6. E005 .......................................11-88
7. E006 .......................................11-88
8. E010 .......................................11-88
9. E013 .......................................11-89
10.E015 .......................................11-90
11. E020 .......................................11-91
12.E030 (The total copy counter
fails to turn on.) ......................11-92
13.E031 (The option counter
has an open circuit.)...............11-92
14.E043 (paper deck-A1) ............11-93
15.E050 .......................................11-94
16.E051 .......................................11-94
17.E202 (The keys on the
control panel are locked.).......11-95
18.E203 .......................................11-95
19.E204 (The keys on the
control panel are locked.).......11-95
20.E210 (fault in lens X direction
drive system) ..........................11-96