While using a re-fillable ink cartridge on my L7590, I forgot to remove the "air" vent plug, and got some air into the cyan ink line. I've managed to purge the air from the line, but the cyan ink still won't print. I purchased and installed a set of new HP Brand 88 ink cartridges last evening, but still no success. I've tried running the clean head process several times.What could be wrong and how can I try to fix it.
Dear Sir/madam,
My recipe for print head cleaning:
1. Soak the print head in
distilled water until it is very clear. Use a small plastic container
that did not contain any chemicals in it before procedure. Single use
containers should be used.
2. Leave the head in distilled water solution for 24hrs. Make sure water level covers ink inlet ports too.
3.
Change distilled water in the container and heat it to degrees 40-50C.
Too hot can damage the dead so make sure to not overheat the water.
When the water is ready submerge the head into the container for 15mins
or so. Make at least 4 cleaning cycles this way.
4. Put a coffee
filter on the table, underneath the coffee filter put 3 - 4 sheets of
paper towel to absorb the cleaning solution.
5. Put the print head
on the coffee filter and get some soda straws (they are ideal for ink
ports on pixma printers) remove rubber padding around ink ports on the
print head by using some instrument as tweezers. Recommended way is to
submerge the head into distilled water because rubber padding can be
removed easily without friction in water. Now when you are ready
connect each soda straw to every ink port.
6. Make a cleaning
solution by using few drops of ammonia solution and distilled water.
For example 2ml of ammonia and 19ml of water in a 20ml syringe. Mix the
solution by shaking the syringe.
7. Fill the soda straws with
cleaning solution. If you get air pockets in the straws use another
20ml syringe to connect and force air trough the straws until there are
no more air pockets and solution level is decreasing in the straws.
Take some patience the method is slow but well worth it. The solution
should decrease faster as more nozzles are cleared. Don’t hesitate to
use the empty syringe to force some air trough the nozzles if you get
air stuck when filling the straws.
8. Finish the cleaning by
injecting pure distilled water and by submerging the print head into
distilled water for 15mins. Then blow the ports with air using a
syringe with a soda straw.
9. Clean the gold contacts on the head
with some isopropyl alcohol and then immediately install into printer
and perform 2 to 5 cleaning cycles or some deep cleaning to prime the
head, and then print some purge pages. Now you can print nozzle check
to see how well the cleaning unclogged the nozzles.
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thanks
good luck
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