HP Designjet T1200 HD User Manual

8.Lower the blue lever.
9.Close the window.
10.Switch on the printer.
11.Reload the roll, or load a new sheet see Paper handling on page 31.
NOTE:If you find that there is still some paper causing an obstruction within the printer, restart the
procedure and carefully remove all pieces of paper.
A strip stays on the output tray and generates jams
If a small piece of paper (200 mm or smaller) has been cut, such as before (if new roll) and after a
full-bleed print or after the Form feed and cut key 
 has...

The printer displays out of paper when paper is available
If the roll has become loose from its core, it will not feed correctly and the printer will not load the
paper. If possible, tighten the paper to its core or load a new roll.
Prints do not fall neatly into the basket
●Ensure the basket is correctly installed.
●Ensure the basket is open.
●Ensure the basket not full.
●Paper often tends to curl near the end of a roll, which can cause output problems. Load a new
roll, or remove prints manually as they...

Recalibrate the paper advance
Accurate paper advance is important to image quality because it is part of controlling the proper
placement of dots on the paper. If the paper is not advanced the proper distance between printhead
passes, light or dark bands appear in the print and image grain may increase.
The printer is calibrated to advance correctly with all the papers appearing in the front panel. When
you select the type of loaded paper, the printer adjusts the rate at which to advance the paper while...

4.Select the percentage of change from –100% to +100%. To correct light banding, decrease the
percentage.
To correct dark banding, increase the percentage.
5.Press the OK key on the front panel, to save the value.
6.Wait until the front panel displays the status screen and re-print your print.
Return to default calibration
Returning to the default calibration sets all the corrections made by the paper advance calibration to
zero. To return to the default paper advance calibration value, you must reset...

16 Troubleshooting print-quality issues
●General advice
●
Print quality troubleshooting wizard
●
Horizontal lines across the image (banding)
●
Lines are too thick, too thin or missing
●
Lines appear stepped or jagged
●
Lines print double or in the wrong colors
●
Lines are discontinuous
●
Lines are blurred
●
Line lengths are inaccurate
●
The whole image is blurry or grainy
●
The paper is not flat
●
The print is scuffed or scratched
●
Ink marks on the paper
●
Black ink comes off when you touch the print
●...

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 
Order paper
on page 129.
●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, use the View information key...

Alternatively, or if you have other print quality problems, you can continue reading this chapter.
Horizontal lines across the image (banding)
If your printed image suffers from added horizontal lines as shown (the color may vary):
1.Check that the paper type you have loaded corresponds to the paper type selected in the front
panel and in your software. To check on the front panel, use the View information key 
.
2.Check that you are using appropriate print-quality settings for your purposes (see...

Lines are too thick, too thin or missing
1.Check that the paper type you have loaded corresponds to the paper type selected in the front
panel and in your software. To check on the front panel, use the View information key 
.
2.Check that you are using appropriate print-quality settings for your purposes (see 
Printing
on page 49). Select the custom print-quality options in the driver dialog, and try turning on the
Maximum detail option (if available). You may wish to reprint your job at this point in...

1.The problem may be inherent in the image. Try to improve the image with the application you
are using to edit it.
2.Check that you are using appropriate print-quality settings. See 
Printing on page 49.
3.Select the custom print-quality options in the driver dialog, and turn on the Maximum detail
option (if available).
Lines print double or in the wrong colors
This problem can have various visible symptoms:
●Colored lines are printed double, in different colors.
●The borders of colored blocks are...

To correct this kind of problem:
1.Reseat the printheads by removing them and then reinserting them. See 
Remove a printhead
on page 117 and Insert a printhead on page 120.
2.Align the printheads. See 
Align the printheads on page 168.
Lines are discontinuous
If your lines are broken in the following way:
1.Check that you are using appropriate print-quality settings. See Printing on page 49.
2.Reseat the printheads by removing them and then reinserting them. See 
Remove a printhead
on page 117 and Insert...