HP B8C95AA Bedienungsanleitung PDF herunterladen (Seite 29)

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101

HP Designjet T Series — Service Manual 1-25

Print quality troubleshooting

Horizontal Lines Across the Image (Banding)

Description of problem

When you look at the image you have printe

d, there are horizontal lines

across the image. Shown below is an example of what you might see if you

have this problem:

Corrective Action

1 Check that the paper type loaded corresponds to the paper type selected in

the f

ront panel and in the software. You can verify the paper type selected

through the Front Panel (Main Menu/Paper menu/View loaded paper).

2 C

heck that the appropriate print quality settings are being used (refer to the

er’s Guide for more information) and reprint the image. In some cases

print quality problems can be resolved by selecting a higher print quality

level.

3 Pr

int the Service Image Diagnostics Print, and clean any printheads that

need cl

eaning. Reprint the job in case the problem has been solved

4 Check the paper advance calibration status. If the status is PENDING,

perform the Paper Advance Calibration (Main Menu/Image Quality

Maintenance/Paper Advance Calibration/Calibrate Paper Advance).

5 A

fter calibration reprint the job.

6 Watch the printer carriage when it reaches the end of its swath. If there is an

unexpec

ted delay, this may cause the banding.

This delay is possibly the result of the following:

 The user is performing tasks with other applications while printing

(particularly image processing applications). These applications are

using too many computer resources, and the computer cannot effectively

process the print job.

 The file to be printed is complex, and the computer does not have the

capacity to print such complex files.

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