Image Edges Are Blurred Or White Banding Occurs; The Contrast Becomes Uneven During Printing - Canon ImagePrograf iPF840 series Basic Manual

Image edges are blurred or white banding occurs

Cause
Printed colors may be uneven if you
set the Print Quality too low.
Color may be uneven between dark
and light image areas.
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.
The Printhead is out of alignment.
Allowing printed documents to dry
on top of each other may cause un-
even colors.
Density may be uneven if you use
Glossy Paper or Coated Paper.
The type of paper specified in the
printer driver does not match the
type loaded in the printer.
Scan Wait Time > Area in the Con-
trol Panel menu is set to Leading
edge.
Image edges are blurred or white banding occurs
Image edges are blurred or white banding occurs
Cause
The Platen suction is too strong.
Incorrect Printhead alignment val-
ue.
The type of paper specified in the
printer driver does not match the
type loaded in the printer.

The contrast becomes uneven during printing

The contrast becomes uneven during printing
114
The paper feed amount is out of adjust-
ment.
(See "Giving Priority to Particular Graphic Elements and Colors for Printing.")
Select Unidirectional Printing in the Advanced Settings of the printer driver.
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.")
Adjust the Printhead alignment.
(See "Automatic Adjustment to Straighten Lines and Colors.")
To avoid uneven colors, we recommend drying each sheet separately.
In Advanced Settings of the printer driver, choose Highest or High in Print Quality.
Load paper of the same type as you have specified in the printer driver.
(See "Loading Rolls in the Printer.")
(See "Loading Sheets in the Printer.")
Make sure the same type of paper is specified in the printer driver as you have loaded in the
printer.
1.
Press the Stop button and stop printing.
2.
Change the type of paper in the printer driver and try printing again.
When Scan Wait Time > Area is set to Leading edge, colors may be uneven 110–160 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.")
In the Control Panel menu, reduce the level of VacuumStrngth.
(See "Adjusting the Vacuum Strength.")
Close the blue Switch on the platen so that it matches the paper size.
(See "Setting the Blue Switch on the Platen.")
In the Control Panel menu, set Head Height to a lower height.
(See "Troubleshooting Paper Abrasion and Blurry Images.")
Load paper of the same type as you have specified in the printer driver.
(See "Loading Rolls in the Printer.")
(See "Loading Sheets in the Printer.")
Make sure the same type of paper is specified in the printer driver as you have loaded in the
printer.
1.
Press the Stop button and stop printing.
2.
Change the type of paper in the printer driver and try printing again.
Cause
Adjust the feed amount.
(See "Adjusting the Feed Amount.")
Corrective Action
P.15
➔
P.25
➔
User's Guide
➔
Corrective Action
User's Guide
➔
User's Guide
➔
P.15
➔
P.25
➔
Corrective Action
User's Guide
➔
iPF840 Series
User's Guide
➔
User's Guide
➔
P.92
➔
User's Guide
➔
Basic Guide