Canon NP6218, FY8-13EX-000 service manual Troubleshooting, II. Standards and ADJUSTMENTS..10-5

CHAPTER 10 TROUBLESHOOTING

I.MAINTENANCE AND INSPECTION..10-3A. 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

x COPYRIGHT © 1997 CANON INC. CANON NP6218 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)