Corrective Action
▲
Perform a Printhead Alignment, using the same paper type with which you were experiencing
unacceptable image quality, if feasible (some paper types are not suitable for Printhead
Alignment).
Diagnostic Part 3: Printheads and paper advance test
This test is designed to check whether the Printheads and the Paper Advance Mechanism are working
correctly. This part of the Image Quality Test should not be used to check for color consistency or
accuracy.
Banding
If the printer is experiencing a banding problem, you will see repetitive horizontal bands within the
printed image.
●
Dark line banding repeated along the band (from top to bottom at the same distance).
●
White line banding repeated along the band (from top to bottom at the same distance).
The plot is printed in Best or Normal mode (according to the menu option selected) with Error Hiding
on. The first top band has 100% ink density patches while the bottom band has 50% ink density.
Troubleshooting Banding Problems
If banding does not occur in all the colors, then it is more than likely a Printhead problem. In this
case, try the following.
1. Check that the appropriate print quality settings are being used.
2. Recover the printheads using the option through the Front Panel (Image quality maintenance
> Clean printheads). Reprint the Diagnostic Print or the print file and if the problem persists,
replace the faulty Printhead.
If banding does occur in all the colors, then it is more than likely a Paper Advance problem:
●
If the bands are light, it means that the paper has advanced too much.
●
If the bands are dark, it means that the paper hasn’t advanced enough.
●
In high quality modes, graininess in all colors can indicate problems either with alignment or
Paper Advance.
In order to solve any of these problems, try the following.
1. Check that the appropriate print quality settings are being used.
2. Check that the loaded paper is the same type as selected in the printer. Check this through the
front panel (at the front panel, select the
icon, then View loaded paper > View paper
details).
156 Chapter 7 Print quality ENWW
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