Canon imagePROGRAF iPF780 Basic Guide download pdf (Page 100)

Cause Corrective Action

When borderless printing is used,

the edge of the paper is cut during

printing. Thus, ink density may be

slightly uneven at the leading edges.

Specify No in Auto Cut in the printer driver before printing. In this case, the paper can be

printed without borders on the left and right sides only. Cut the printed document ejected

from the printer, and then use scissors or a cutting tool to cut away the edges on the top and

bottom.

Choose a higher level of Print Quality in the Advanced Settings of the printer driver.

(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") ➔ User's Guide

The Printhead is out of alignment. Adjust the Printhead alignment.

(See "Automatic Adjustment to Straighten Lines and Colors.") ➔ P.79

Allowing printed documents to dry

on top of each other may cause un-

even colors.

To avoid uneven colors, we recommend drying each sheet separately.

Density may be uneven if you use

Glossy Paper or Coated Paper.

In Advanced Settings of the printer driver, choose Highest or High in Print Quality.

The type of paper specified in the

printer driver does not match the

type loaded in the printer.

Load paper of the same type as you have specified in the printer driver.

(See "Loading Rolls in the Printer.") ➔ P.15

(See "Loading Sheets in the Printer.") ➔ P.21

Make sure the same type of paper is specified in the printer driver as you have loaded in the

printer.

Press the Stop button and stop printing.

Change the type of paper in the printer driver and try printing again.

Scan Wait Time > Area in the Con-

trol Panel menu is set to Leading

edge.

When Scan Wait Time > Area is set to Leading edge, colors may be uneven 110–140 mm

from the leading edge. (The position varies depending on the Print Quality setting.)

In this case, select Scan Wait Time > Area > Entire area.

However, note that printing will now take longer.

(See "Menu Settings.") ➔User's Guide

Image edges are blurred or white banding occurs

Cause Corrective Action

The Platen suction is too strong. In the Control Panel menu, reduce the level of VacuumStrngth.

(See "Adjusting the Vacuum Strength.") ➔User's Guide

Incorrect Printhead alignment value. In the Control Panel menu, set Head Height to a lower height.

(See "Troubleshooting Paper Abrasion and Blurry Images.") ➔ User's Guide

The type of paper specified in the

printer driver does not match the

type loaded in the printer.

Load paper of the same type as you have specified in the printer driver.

(See "Loading Rolls in the Printer.") ➔ P.15

(See "Loading Sheets in the Printer.") ➔ P.21

Make sure the same type of paper is specified in the printer driver as you have loaded in the

printer.

Press the Stop button and stop printing.

Change the type of paper in the printer driver and try printing again.

The contrast becomes uneven during printing

Cause Corrective Action

The paper feed amount is out of adjust-

ment.

Adjust the feed amount.

(See "Adjusting the Feed Amount.") ➔User's Guide

The type of paper specified in the printer

driver does not match the type loaded in

the printer.

Load paper of the same type as you have specified in the printer driver.

(See "Loading Rolls in the Printer.") ➔ P.15

(See "Loading Sheets in the Printer.") ➔ P.21

Make sure the same type of paper is specified in the printer driver as you have loaded

in the printer.

Press the Stop button and stop printing.

Image edges are blurred or white banding occurs

iPF780 Series

Basic Guide

Troubleshooting Problems with the printing quality

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Canon imagePROGRAF iPF780 Basic Guide Page 100

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