Resetting the Hewlett Packard 51645a (#45) or C6115 (#15) Black Ink Cartridge
Estimated Ink Level
are a few different ways to get the estimated ink level to read full on your
HP toolbox. To better understand the procedure you are about to
follow, it helps to know what causes your cartridge to read empty.
There is a serial number embedded in the electrical that allows the printer
to keep track of each cartridge's activity. The printer will remember
the previous two cartridges that have been inserted. After a third
cartridge has been inserted, the memory of the first cartridge is dumped and
lost forever. After that, if the first cartridge is reinserted into
the printer, it will read full again even though it may actually be empty.
Listed below are three procedures to reset the estimated ink level on a #45
or #15. One of the three will work, so if the first one doesn't,
proceed to the second reset method and so on.
reset the HP 51645 (#45) or HP C6115 (#15):
Refill your cartridge using your Mr. Ink Jet refill kit.
Following the diagram at right, place a piece of adhesive tape covering the
colored contacts (a contact is the individual copper square). Make
sure that only those four are covered and no others.
Place cartridge in the printer. The printer may tell you that there is
a problem with your cartridge. Ignore this message. The printer
may print an alignment page. If so, allow it to do so.
Take the cartridge out of the printer. Remove the tape from the four
blue contacts. Place the tape over the four
contacts. Make sure that only those four are covered and no others.
Follow step 3 again.
Take the cartridge out of the printer for the final time. Take the
remaining tape off and place back in the printer. The printer should
print out an alignment page and the estimated ink level in the toolbox
should read full.
If Reset Method
1 did not work on your printer, go through the same procedure again, but
this time using the
contacts in step 2 and the
contacts in step 4. This method is more commonly used for the #15 or
in the later officejet printers.
neither of the reset methods above worked, you can cycle cartridges through
to reset the level. You will need two extra cartridges and the one you
refilled. First, put the refilled cartridge in the printer.
Allow it to recognize the cartridge and print an alignment page. Take
that cartridge out and place in the first extra cartridge. Allow it to
recognize and print an alignment page. Take the first extra cartridge
out and place the second extra cartridge in. Allow it to recognize and
print an alignment page. Take the second extra cartridge out.
Place the refilled cartridge back in the printer. It will print an
alignment page and then the estimated ink level will be reset to full.
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