HP Designjet T1200 HD User Manual

5.If you are using glossy paper, try changing to a different type of glossy paper.
6.Align the printheads. See 
Align the printheads on page 168.
Line lengths are inaccurate
If you have measured your printed lines and find that the lengths are not sufficiently accurate for your
purposes, you can try to improve line length accuracy in the following ways.
1.Print on HP Matte Film, for which your printers line length accuracy is specified. See 
Functional
specifications on page 184.
Polyester film is about...

the printheads on page 168. After alignment, you may wish to reprint your job in case the
problem has been solved.
5.
Go to the front panel and press the View information key 
 to see the paper advance calibration
status. If the status is DEFAULT, you should perform paper advance calibration: see 
Recalibrate
the paper advance on page 145.
If the problem persists despite all the above actions, contact your customer service representative for
further support.
The paper is not flat
If the paper does not...

To reduce the risk of scuffs and scratches:
●Handle prints carefully.
●Avoid stacking prints on top of each other.
●Catch your prints as they are cut from the roll and do not let them fall into the basket.
Alternatively, leave a sheet of paper in the basket so that freshly printed sheets do not make
direct contact with the basket.
Ink marks on the paper
This problem can occur for several different reasons.
Horizontal smears on the front of coated paper
If a lot of ink is used on plain or coated paper,...

Clean the platen with a soft cloth. Clean each rib separately without touching the foam between the
ribs.
Black ink comes off when you touch the print
This problem may be caused by printing with matte black ink on glossy paper. The printer will not use
matte black ink if it knows that the paper will not retain it. To be sure of avoiding matte black ink, you
can select Photo Glossy Paper as the paper type (in the Photo Paper category).
Edges of objects are stepped or not sharp
If edges of objects or lines...

Vertical lines of different colors
If your print has vertical bands of different colors along it:
1.Try using thicker paper, choosing from the recommended paper types such as HP Heavyweight
Coated Paper and HP Super Heavyweight Paper. See 
Order paper on page 129.
2.Try using higher print-quality settings (see 
Printing on page 49). For instance, if you have set the
Print Quality slider to Speed, try setting it to Quality.
White spots on the print
You may notice white spots on the print. This is probably...

6.Print the Image Diagnostics Print. See The Image Diagnostics Print on page 160.
7.Try using the color adjustment options to produce the colors you want. See 
Color adjustment
options on page 69.
If the problem persists despite all the above actions, contact your customer service representative for
further support.
Color accuracy using EPS or PDF images in page layout applications
Page layout applications such as Adobe InDesign and QuarkXPress do not support color
management of EPS, PDF or grayscale...

●If you have defined a custom page size with very narrow margins, the printer may impose its
own minimal margins, clipping your image slightly. You may want to consider using a larger
paper size, or borderless printing (see 
Select margins options on page 52).
●If your image contains its own margins, you may be able to print it successfully by using the Clip
Contents by Margins option (see 
Select margins options on page 52).
●If you are trying to print a very long image on a roll, check that your...

A PDF file is clipped or objects are missing
In older versions of Adobe Acrobat or Adobe Reader, large PDF files could be clipped or lose some
objects when printing with the HP-GL/2 and HP RTL driver at high resolution. In order to avoid such
problems, upgrade your Adobe Acrobat or Adobe Reader software to the latest version. From version
7 onwards, these problems should be solved.
The Image Diagnostics Print
The Image Diagnostics Print consists of patterns designed to highlight printhead reliability...

First look at the upper part of the print (part 1). Each colored rectangle should be a uniform color
without any horizontal lines across it.
Then look at the bottom part of the print (part 2). For each individual colored pattern, check that most
of the dashes are present.
If you see horizontal lines in part 1 and also missing dashes in part 2 for the same color, the printhead
responsible needs cleaning. However, if the rectangles look solid, do not worry about just a few
missing dashes in part 2; these...

4.If the problem remains, try cleaning the printhead drop detector. The printer normally notifies you
when this is necessary, but it may be worth trying even if the printer has not suggested it. See
Clean the printhead drop detector on page 165.
5.If the problem still remains, replace any persistently faulty printheads (see 
Handling ink
cartridges and printheads on page 112), or contact HP Support (see Contact HP Support
on page 182).
If you still have a problem
If you still experience print-quality...