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HP Designjet T Series — Service Manual 1-44
Ink Supplies Troubleshooting
The printer consumes more gray ink ink than M, C, or Y
This is not a problem, and no action should be taken to “correct” this
attribute of the printer.
In general the higher frequency of change is because Matte Black ink is the
one that is u
sed for lines and black objects in technical papers (bond,
coated, HW coated, natural tracing paper, etc.), which are the types of
contents that are more commonly printed with this type of printer.
About gray ink
The T Series Printers are the first HP Designjet technical products to include
Gray
ink. One thing that users may notice is that Gray ink is used in higher
quantities than Cyan, Magenta and Yellow inks. This happens because of
the following reasons:
1) Gray areas (which are very typical in technical drawings) can now be
printe
d by using only Gray ink. In the past, these areas had to be printed by
combining Cyan, Magenta and Yellow inks. This means that Gray ink is
used more frequently than the rest of the inks (C, M, Y) which are now used
less frequently, so the difference in consumption is noticeable. However
overall the T Series Printers will actually need to use in total less ink to print
gray areas than previous Designjet products.
2) Soft colors can now be printed by combining C, M and Y inks with Gray.
T
he additi
on of Gray ink softens the color, improving transition areas. It also
allows printing soft colors by using less C, M and Y. These two types of
contents are very typical and make the consumption of Gray to increase and
the consumption of C, M and Y to decrease.
Conclusion
However, no matter the combination of inks that are used, when the total
cc’s of ink
are
added up, the T Series Printers will always have a lower ink
consumption than the HP Designjet 500, 800 and 1000 series for
equivalent contents with equivalent levels of print quality.
Changing an Ink Cartridge
There are two occasions when you need to remove an ink cartridge:
The ink cartridge is very low and you want to replace it with a full
cartridge for unattended printing (you can use up the remaining ink in the
first cartridge at a more convenient time).
The ink cartridge is empty or faulty, and you must replace it to continue
printing.
Do not try to remove an ink cartridge while printing.
Remove an ink cartridge only if you are ready to insert
another one.
Make sure the printer wheels are locked (the brake lever is
pressed down) to prevent the printer from moving.
Change an ink cartridge using the following procedure: