Canon imageRUNNER ADVANCE 4551i Service Manual page 317

2. Check the A part of the printed paper for the squareness of the image. Make adjustment if it is not at a right angle.
3. Remove the Front Cover.
4. Loosen the adjustment screw.
5. Adjust the position of the guide supporting the Scanner Unit.
A = less than 90 degrees: Move the Guide to the left side (black arrow).
A = 90 degrees or more: Move the Guide to the right side (white arrow).
6. Tighten the screws after adjustment.
7. Print the test chart again, and check that it is at a right angle.
■ Adjustment of the Stream Reading
1. Execute the following service mode item.
• COPIER > FUNCTION > INSTALL > STRD-POS
■ Side registration adjustment
NOTE:
There are two adjustment methods: One for reading the front side (Scanner Unit on the Reader side) and another for reading the
back side (Scanner Unit on the ADF side).
● Adjustment of the Paper Front Reading
1. Place a test chart on the Document Pickup Tray and perform a 1-sided print.
2. Overlay the printed paper onto the test chart.
Image on test chart
Printed image
Feed direction
[1]
304
5. Adjustment
[2]