HP Designjet T790 1118 mm User Manual

							If nesting is turned on, the prioritized job may still be nested with others. If you really want this job to
be printed next, and not nested with others, first turn nesting off and then move it to the front of the
queue as described above.
Delete a job from the queue
Under normal circumstances, there is no need to delete a job from the queue after printing it, as it will
just fall off the end of the queue as more files are sent. However, if you have sent a file in error, and
want to avoid printing it, you can simply select the job and then select Delete.
In the same way, you can delete a job that has not been printed yet.
If the job is currently being printed (its status is printing), you can select Cancel and then Delete.
Reprint or copy a job in the queue
To reprint or make extra copies of any job in the queue, select the job in the Embedded Web Server
and click the Reprint icon, then specify the number of copies you want. The job will be moved to the
top of the queue. To make more than one print of a non-printed job in the queue from the front panel,
select the job and choose Copies, then specify the number of copies required. This overrides any value
set by your software.
NOTE:If Rotate was On when you sent the file, every copy will be rotated.
NOTE:You cannot use this method for PCL3GUI jobs. To reprint old jobs that are PCL3GUI, you may
be able to use your operating systems printer spooler, if you have already set the spooler to save old
jobs. This facility depends on your operating system.
NOTE:When reprinting a print job, you cannot change the print settings, because the job has
already been rasterized.
Job status messages
These are the possible job status messages, approximately in the order in which they may be seen:
●Receiving: the printer is receiving the job from the computer
●Waiting to process: the job has been received by the printer and is waiting to be rendered (for
jobs submitted through the Embedded Web Server only)
●Processing: the printer is parsing and rendering the job
●Preparing to print: the printer is performing writing system checks before printing the job
●Waiting to print: the job is waiting for the print engine to become free to proceed with printing
●Waiting for nest: the printer is set up with Nesting=On and is waiting for other jobs in order to
complete the nest and proceed with printing
●On hold: the job was sent with the on hold for preview option and is on hold
NOTE:Do not send a job for preview with more than 64 pages, this may cause the driver
software to crash.
NOTE:If the printer hangs up while printing a job, and the queue facility is turned on, the
partially printed job will appear in the queue as on hold when the printer is next turned on.
When you resume the job, it will start printing at the page at which it was interrupted.
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							●On hold for paper: the job cant be printed because the right paper is not loaded in the
printer. Load the required paper, see 
Paper handling on page 38, and click Continue to resume
the job
●On hold for accounting: the job cant be printed because the printer requires all jobs to have
an account ID: enter the account ID and then click Continue to resume the job
TIP:To set an account ID, see Require account ID (T1300 series) on page 31.
●Printing
●Drying
●Cutting paper
●Ejecting page
●Canceling: the job is being canceled, but will remain in the printer job queue
●Deleting: the job is being deleted from the printer
●Printed
●Canceled: the job has been canceled by the printer
●Canceled by user
●Empty job: the job does not contain anything to print
Reactivate a job on hold
When the printer puts a job on hold you receive an alert, see Alerts on page 195, which explains why
the job is on hold. Follow the instructions on the screen to remove the hold and continue printing.
Turn off the job queue
To turn off the job queue, select the Setup tab, then Printer settings > Job management >
Queue and select Off.
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							10 Color management
●Introduction
●
How colors are represented
●
A summary of the color management process
●
Color calibration
●
Color management from printer drivers
●
Color management from printer drivers (PostScript printers)
●
Color management from the Embedded Web Server (T1300 series)
●
Color management from the front panel
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							Introduction
Your printer has been engineered with advanced hardware and software features to ensure predictable
and dependable results.
●Color calibration for consistent colors.
●One gray and two black inks provide neutral grays on all paper types.
●The Photo Black ink provides pure blacks when printing on photo papers.
●Color emulation of other HP Designjet printers.
How colors are represented
All devices that display color use a color model to represent color in numerical terms. Most monitors
use the RGB (Red-Green-Blue) color model, while most printers use the CMYK (Cyan-Magenta-Yellow-
blacK) color model.
An image can be converted from one color model to another, but in general the conversion is not
perfect. Your printer uses the RGB color model: the same color model that is used by your monitor.
This simplifies but does not completely solve the problem of matching colors. Each device represents
colors a little differently from another device, even if they use the same color model. However, software
can adjust the colors in an image according to the characteristics of the particular device, using a color
profile of the device, in order to achieve correct colors.
A summary of the color management process
To get the accurate and consistent colors that you want, you should follow these steps for each paper
type that you use.
1.Color-calibrate the paper type, for consistent colors. Calibration should be repeated every now
and then (see 
Color calibration on page 86). In addition, you may wish to calibrate
immediately before a particularly important print job for which color consistency is vital.
2.When printing, select the correct color preset for the paper type you are using.
Color calibration
Color calibration enables your printer to produce consistent colors with the particular printheads, inks
and paper type that you are using, and under your particular environmental conditions. After color
calibration, you can expect to get similar prints from any two different printers situated in different
geographical locations.
Some paper types cannot be calibrated. For all other paper types, calibration should be done in any of
the following circumstances:
●Whenever a printhead is replaced
●Whenever a new paper type is introduced that has not yet been calibrated with the current set of
printheads
●Whenever the environmental conditions (temperature and humidity) change significantly
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							You can check the color calibration status of the currently loaded paper at any time by pressing 
and then  on the front panel. The status may be one of the following:
●Recommended: the paper has not been calibrated.
NOTE:Whenever you update the printers firmware, the color calibration status of all papers is
reset to Recommended.
●Obsolete: the paper has been calibrated, but the calibration is now out of date because a
printhead has been replaced, and should be repeated.
●Done: the paper has been calibrated, and the calibration is up to date.
●Disabled: this paper cannot be calibrated.
NOTE:Color calibration cannot be performed on plain paper, nor on any kind of transparent
material.
You can also check the color calibration status by using the HP Utility.
You can start color calibration in the following ways:
●From the HP Utility for Windows: select Color Center > Calibrate paper, and choose the
paper to be calibrated.
●From the HP Utility for Mac OS: select Paper Preset Management from the HP Color Center
group, choose the paper to be calibrated, press the 
 button and select Calibrate Paper.
●
From the front panel: press 
, then , then Image quality maintenance > Calibrate
color.
The calibration process is fully automatic and can be performed unattended after you have loaded
paper of the type you wish to calibrate—which should be A4 or any larger size. If you have more than
one roll loaded, the printer will ask which roll you want to use for the calibration.
The process takes about 3–5 minutes and consists of the following steps.
1.A calibration chart is printed, which contains patches of each ink used in your printer.
2.The chart is allowed to dry for a period of time that depends on the paper type, so that the colors
have time to stabilize.
3.The chart is scanned and measured.
4.From the measurements, the printer calculates the necessary correction factors to apply for
consistent color printing on that paper type. It also calculates the maximum amount of each ink
that can be applied to the paper.
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							Color management from printer drivers
Color management options
The aim of color management is to reproduce colors as accurately as possible on all devices: so that,
when you print an image, you see very similar colors as when you view the same image on your
monitor.
There are two basic approaches to color management for your printer:
●Application-Managed Colors: in this case your application program must convert the colors
of your image to the color space of your printer and paper type, using the ICC profile embedded
in the image and the ICC profile of your printer and paper type.
●Printer-Managed Colors: in this case your application program sends your image to the
printer without any color conversion, and the printer converts the colors to its own color space. The
details of this process depend on the graphics language that you are using.
◦PostScript (PostScript printers): the PostScript interpreter module performs the color
conversion using the profiles stored in the printer and any additional profiles sent with the
PostScript job. This kind of color management is done when you are using the PostScript
driver and you specify printer color management or when you send a PostScript, PDF, TIFF or
JPEG file directly to the printer through the Embedded Web Server. In either case you have to
select the profiles to use as default (in case the job doesnt specify any) and the rendering
intent to apply.
◦Non-PostScript (PCL, RTL, HP-GL/2): the color management is done using a set of
stored color tables. ICC profiles are not used. This method is somewhat less versatile than the
alternatives, but is a little simpler and faster, and can produce good results with standard HP
paper types. This kind of color management is done when you are using a non-PostScript
driver and you specify printer color management, or when you send a PCL, RTL or HP-GL/2
file directly to the printer through the Embedded Web Server.
NOTE:There are only two color spaces that the printer can convert to its own color space
using the stored color tables: Adobe RGB and sRGB if you are using Windows, Adobe RGB
and ColorSync if you are using Mac OS.
ColorSync is the Mac OS built-in Color Management System; so, when you select ColorSync,
color management is performed by Mac OS, and it is done based on the ICC profiles of the
specified paper type. ColorSync is available with the PCL3GUI driver only.
ColorSync can be selected from the Color Matching panel.
You are recommended to consult the Knowledge Center (see Knowledge Center on page 201) to see
how to use the color management options of your particular application.
To choose between Application-Managed Colors and Printer-Managed Colors:
●In the Windows driver dialog: select the Color tab.
●In the Mac OS Print dialog: select the Color Options panel.
●In some applications: you can make this choice in the application.
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							Printer emulation
If you want to print a particular job and to see approximately the same colors that you would get from
printing the same job on a different HP Designjet printer, you can use the emulation mode provided by
your printer.
NOTE:This option is available only when printing an HP-GL/2, PostScript or PDF job. It will work
correctly only when printing on plain, coated or heavyweight coated paper.
●In the Windows HP-GL/2 or PostScript driver dialog: select the Color tab, then Printer
Managed Colors, then select Printer Emulation from the Source Profile list. You can then
select from the Emulated Printer list.
●In the Mac OS Print dialog (non-PostScript printers): select the Color Options panel,
then Color Management > Printer, then select Printer Emulation from the Source Profile
list.
●In the Mac OS Print dialog (PostScript printers): select the Color Options panel, then
select from the Printer Emulation list.
Color adjustment options
The aim of color management is to print accurate colors. If you perform color management correctly,
then you should be able to print accurate colors with no need of any manual color adjustments.
However, manual adjustments may be useful in the following situations:
●If your color management is not working correctly for some reason
●If you want colors that are subjectively pleasing rather than accurate
The printer driver provides different adjustment facilities depending on whether you are printing in color
or in grayscale. If you are printing in pure black and white, there are no color adjustment options.
Printing in color
You can adjust the colors of your print in similar ways under Windows and Mac OS:
●In the Windows driver dialog: select the Color tab, ensure that the Advanced color
adjustments box is checked, then press the Settings button beside it.
●In the Mac OS Print dialog (non-PostScript printers): select the Color Options panel,
select Color from the Mode list, then press the Adjust button.
●In the Mac OS PostScript Print dialog (PostScript printers): select the Color Options
panel, select Color from the Mode list, then press the Adjust button.
Under either operating system, you will then be able to make adjustments using a lightness slider and
three color sliders.
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							●The lightness slider simply makes the whole print lighter or darker.
●The color sliders can be used to fade or emphasize each of the primary colors in the print. The
primary colors may be red, green and blue; or cyan, magenta and yellow; depending on the
color model used in the image.
The Reset button restores each slider to its default central position.
Printing in grayscale
You can convert all colors in your image to shades of gray in the following ways:
●In your application program: many programs provide this option.
●In the Windows driver dialog: go to the Color tab and look at the Color Options section.
Select Print in Grayscale. You can also select Print in pure black and white if you want
only black and white, without gray shades.
●In the Mac OS Print dialog (non-PostScript printers): go to the Color Options panel
and select Grayscale from the Mode drop-down list. You can also select Pure Black and
White if you want only black and white, without gray shades.
●In the Mac OS PostScript Print dialog (PostScript printers): go to the Color Options
panel and select Grayscale from the Mode drop-down list. You can also select Pure Black
and White if you want only black and white, without gray shades.
●On the Embedded Web Servers Submit Job page (T1300 series): select Color, then
set Color/Grayscale to Print In Grayscale. You can also select Pure Black and White if
you want only black and white, without gray shades.
You can adjust the gray balance of your print in similar ways under Windows and Mac OS:
●In the Windows driver dialog: select the Color tab, ensure that the Advanced color
adjustments box is checked, then press the Settings button beside it.
●In the Mac OS Print dialog (non-PostScript printers): select the Color Options panel,
select Grayscale from the Mode list, then press the Adjust button.
●In the Mac OS PostScript Print dialog (PostScript printers): select the Color Options
panel, select Grayscale from the Mode list, then press the Adjust button.
Under either operating system, you will then be able to make adjustments using separate controls for
highlights, midtones and shadows.
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							●The lightness slider simply makes the whole print lighter or darker. This slider is available in the
same window as the other grayscale controls.
●The zone definition sliders can be used to define what you mean by highlight, midtone and
shadow.
●The other controls for highlight, midtone and shadow can be used to adjust the gray balance of
highlights, midtones and shadows respectively.
The Reset button restores each control to its default setting.
Color management from printer drivers (PostScript
printers)
This facility is available when printing with the PostScript driver.
HP Professional PANTONE Emulation
When you use a named PANTONE color in an image, your application will normally send to the
printer a CMYK or RGB approximation to that color. But the application does not take the printer or the
paper type into account, it merely produces a generic approximation of the PANTONE color, which
will look different on different printers and on different papers.
HP Professional PANTONE Emulation can do a much better job by taking into account the
characteristics of the printer and the paper type. The results look as similar to the original PANTONE
colors as is possible on a given printer using a given paper type. This technology is designed to
produce emulations similar to those set up manually by prepress professionals.
To use HP Professional PANTONE Emulation, all you have to do is to turn it on. In fact, it is normally on
by default.
●In the Windows PostScript driver dialog: go to the Color tab and select HP
Professional PANTONE Emulation.
●In the Mac OS PostScript Print dialog: go to the Color Options panel and select HP
Professional PANTONE Emulation.
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							You can also use the Embedded Web Server to print a swatch book showing emulations of PANTONE
colors as made by your printer, together with a measure of the color difference (ΔE) between each
emulation and the original PANTONE spot color. So HP Professional PANTONE Emulation not only
provides the closest match that can be achieved on your printer; it also gives clear information on how
close the emulation is to the original spot color. See 
Printing PANTONE swatch books (T1300 PS)
on page 95.
Color emulation
Your printer can emulate the color behavior of other devices: RGB devices such as monitors, and
CMYK devices such as presses and printers.
You can set color emulation in the following ways:
●In the Windows PostScript driver dialog: select the Color tab, and Printer Managed
Colors.
●In the Mac OS Print dialog: select the Color Options panel, then select Printer from the
Color Management list.
For a good emulation, the printer needs a specification of the colors these devices can reproduce. The
standard way of encapsulating such information is in ICC profiles. As part of the solution, we provide
the most common standards for the different devices.
The options are as follows.
CMYK color emulation
A traditional workflow defines color in the CMYK space. For best results, the colors must be adjusted to
the printer, because different printers will produce different colors from the same CMYK data. If the
image file you are printing was not created specifically for your printer, it will require some
readjustment, which can be done using one of the following options provided with your printer.
●None (Native): no emulation. The printer will use its default internal conversion from CMYK to
RGB, without following any color standard. This does not imply that results will be bad
●ISO Coated 2-ECI is based on the characterization dataset FOGRA39L.txt, applicable to the
following reference printing conditions according to the international standard ISO
12647-2:2004/Amd 1: commercial and specialty offset, paper type 1 and 2, gloss or matt
coated paper, positive plates, tone value increase curves A (CMY) and B (K), white backing.
●Coated GRACoL 2006-ISO12647 provides GRACoL proofing and printing on Grade 1
coated paper, ISO 12647-2 Paper type 1.
●PSO Uncoated ISO12647-ECI is based on the characterization data set FOGRA47L.txt,
applicable to the following reference printing condition according to the international standards
ISO 12647- 2:2004 and ISO 12647-2:2004/Amd 1:2007: commercial and specialty offset,
paper type 4, uncoated white paper, positive plates, tone value increase curves C (CMY) and D
(K), white backing.
●PSO LWC Improved-ECI is based on the characterization data set FOGRA45L.txt, applicable
to the following reference printing condition according to the international standards ISO
12647-2:2004 and ISO 12647-2:2004/Amd 1:2007: commercial and specialty offset,
improved LWC paper (light weight coating), positive plates, tone value increase curves B (CMY)
and C (K), white backing.
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