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Troubleshooting and Maintenance 49
During this process the printer will make several loud
whirring noises. This is normal! This is the sound of a pump
forcing ink through the nozzles. If you do not hear this sound,
the clean purge print did not complete successfully. Try again.
3B. Deep clean the cartridge.
(Optional - Only clean in this manner if no back up printheads
are available and if the above cleaning procedure have yielded
little improvement.) Remove the printhead from the printer,
remove the cartridges from the printhead. Run warm/hot
water through the printhead wells. At the same time use a wet
paper towel and repeatedly press on the print nozzle to wick
the ink out. Do this until almost no ink is running out of the
nozzles. Thoroughly and completely dry the printhead.
Especially, make sure no water remains near the copper contact
areas. Finally, clean the print carrier copper contacts on the
printer itself with isopropyl alcohol on a paper towel.
3C. Preventing clogged nozzles.
Clogged nozzles on the printhead can be caused by non use of
the printer for extended periods of time. Follow these guide-
lines:
• Always keep the LX900 plugged in and turned on. The
printer will do periodic maintenance to make sure the noz-
zles do not clog.
• Never store a used printhead outside of the printer. The
nozzles will dry out with exposure to air. If you must store
a printhead outside of the printer, place full or empty car-
tridges in the printhead and put the entire printhead and
cartridges in a sealed plastic bag.
• Use the printer regularly!
4. Quality Setting. Change your quality setting. The lowest
(and fastest printing) quality may not be sufficient for
many photos or graphics. The highest quality setting may
cause ink to bleed on certain graphics in combination with
certain label stock. Increasing the quality increases print
time because the printer makes more passes over the
media.
5. Replace Printhead/Cartridge. The cartridge may be empty
or defective. The printhead nozzle for one color could be
clogged. The fastest way to diagnose a quality problem is
to have backup printheads and cartridges available for
comparison testing. If one color is missing, replace that
color cartridge(s). Next try replacing the print head.
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