Leading Edge Registration Adjustment - Canon F1 Service Manual

5
Adjustments > Adjustment Method > Leading Edge Registration Adjustment

Leading Edge Registration Adjustment

Note:
There are 2 adjustment methods; for front side reading (reader side scanner unit) and
for back side reading (DADF side scanner unit).
a. Adjustment for front side reading
1) Set a test chart on the original pickup tray and make a 1-sided print.
2) Overlap the printed paper with the test chart.
3) Check that the leading edge of the printed image is within the standard.
Standard: A </= 1 mm
< If the image is displaced toward trailing edge > < If the image is displaced toward leading edge >
Leading edge of
Image leading edge of
printed image
test chart
A
Feed direction
4) If it is out of standard, make an adjustment in service mode.
Lv. FEEDER > ADJUST >
1 DOCST
T-5-46
If the image is displaced toward trailing edge, increase the value (image is moved forward).
If the image is displaced toward leading edge, decrease the value (image is moved
backward).
• Changes per 1 unit: 0.1 mm
• Adjustment range: -50 to +50
5) Printout a test chart again and check that the image is within the standard.
5 Adjustments > Adjustment Method > Leading Edge Registration Adjustment
Image leading edge of
Leading edge of
test chart
printed image
A
Feed direction
b. Adjustment for back side reading
1) Set a test chart on the original pickup tray upside down and make a 2-sided print.
2) Overlap the printed paper with the test chart.
3) Check that the leading edge of the printed image is within the standard.
Standard: A </= 1 mm
< If the image is displaced toward trailing edge > < If the image is displaced toward leading edge >
Leading edge of
Image leading edge of
printed image
test chart
A
Feed direction
4) If it is out of standard, make an adjustment in service mode.
Lv. FEEDER > ADJUST >
1 DOCST2
If the image is displaced toward trailing edge, increase the value (image is moved forward).
If the image is displaced toward leading edge, decrease the value (image is moved
F-5-27
backward).
• Changes per 1 unit: 0.1 mm
• Adjustment range: -50 to +50
5) Printout a test chart again and check that the image is within the standard.
Image leading edge of
Leading edge of
test chart
printed image
A
Feed direction
T-5-47
5-20
F-5-28
5-20