HP DesignJet 4000 User Manual

Prints do not stack properly in the basket [4500]
NOTEThis topic applies to the HP Designjet 4500 Printer series only.
●Prints at the bottom of the basket may be damaged by the weight of the prints above them. For
this reason, we recommend to collect prints from the basket before it becomes full.
●Coated paper with high ink content may be crumpled when falling into the basket. In this case
prints need to be collected from the basket more frequently than usual.
The printer uses a lot of paper to align the...

CAUTIONIf you want to turn off the printer, you are strongly recommended to use the
Power button on the front panel before using the switch at the rear or disconnecting the power
cable.
258 Chapter 17   The problem is... (paper topics) ENWW
The problem is... (paper
topics)
 

18 The problem is... (print quality topics)
●General advice
●
Banding (horizontal lines across the image)
●
Lines are missing or thinner than expected
●
Solid bands or lines printed over the image
●
Graininess
●
The paper is not flat
●
The print smudges when touched
●
Ink marks on the paper
●
A defect near the start of a print
●
Lines are stepped
●
Lines are printed double or in wrong colors
●
Lines are discontinuous
●
Lines are blurred (ink bleeds from lines)
●
Lines are slightly warped
●
Color...

General advice
When you have any print quality problem:
●To achieve the best performance from your printer, use only genuine manufacturers supplies
and accessories, whose reliability and performance have been thoroughly tested to give trouble-
free performance and best-quality prints. For details of recommended papers, see 
Supported
paper types.
●Make sure that the paper type selected in the front panel is the same as the paper type loaded
into the printer. To check this, highlight the 
 or  icon on the...

Lines are missing or thinner than expected
1.Check that the line thickness and color settings are correct in your application.
2.Check that you are using appropriate print quality settings. See 
Choose print quality settings.
3.If the problem persists, clean the printheads. See 
Recover (clean) the printheads.
4.If the problem persists, use the Image Diagnostics Print to find out more about it. See 
How do
I... (Image Diagnostics Print topics).
Solid bands or lines printed over the image
This kind of...

In each case the recommended procedure is as follows:
1.Clean the electrical connections of the printhead that seems to be responsible (in this example,
the magenta printhead). See 
Clean a printheads electrical connections.
2.Clean the printheads. See 
Recover (clean) the printheads.
3.Reprint your image with the same settings as before.
4.If the problem persists, replace the printhead that seems to be causing the problem. If you are
not sure which printhead is responsible, use the Image Diagnostics...

Try changing to a heavier paper type: we recommend HP Heavyweight Coated Paper or HP
Productivity Photo Gloss for printing dense colors. See also 
Choose print quality settings.
The print smudges when touched
The black ink pigment can smudge when touched by a finger or pen. This is particularly noticeable
on the following materials: vellum, translucent bond, films, productivity photo paper, and natural
tracing paper.
To reduce the smudging:
●Try to print in an environment which is not too humid for the...

Try the following suggestions to avoid this problem:
●Use a recommended paper type (see 
Supported paper types).
●If the image you are printing contains intense color, try using HP Heavyweight Coated Paper.
●Use extended margins (see 
Adjust the margins), or try to increase the margins by relocating the
image within the page using your software application.
●If necessary, try changing to a non-paper-based material such as transparent film.
Smears or scratches on the front of glossy paper
Glossy paper may...

To avoid this problem:
1.The easiest solution is to select the Extended Margins option in the driver, the Embedded Web
Server, or the front panel. This means that the area of the paper affected by the problem (at the
start of the page) will no longer be printed on. See 
Adjust the margins.
2.Align the printheads. See 
Align the printheads.
3.Check that you are using appropriate print quality settings. See 
Choose print quality settings.
Lines are stepped
If lines in your image appear stepped or jagged...

●The borders of colored blocks are wrongly colored.
To correct this kind of problem:
1.Align the printheads. See 
Align the printheads.
2.Check that you are using appropriate print quality settings. See 
Choose print quality settings.
Lines are discontinuous
If your lines are broken in the following way:
1.Check that you are using appropriate print quality settings. See Choose print quality settings.
2.You are more likely to get good vertical lines with roll paper than with sheet paper. If you must
use...