Have a cannon mp730 multipass screen shows wrong cartridge cartridges are ok ?
Resetting the Waste Ink Volume Counter
1) Enter SERVICE MODE.---
By pressing Menu-Copy-#
2) Select TEST MODE [set].
3) Select  PRINTER TEST in TEST MODE
4) Select 3. [EEPROM CLEAR].
5) Select 0. [INK COUNT].
6) Press the [OK] key.
7) Press the [Stop/Reset] key (returning to the state of 3)), and then press the [ON/OFF] key.
If the printheads are badly clogged and the printer driver cleaning cycles aren't fixing it, you may try the
First effort: put a few drops of cleaning solution onto the park pad "sponge". This is that sponge-looking thing
(actually a hard plastic foam) where the head sits when not printing. Just do whatever it takes on that printer to
unpark the heads as if you were going to change cartridges, then close it up and let it sit for a day before you
run a cleaning cycle and nozzle check again.
Extremely Thorough Cleaning: Take the head out, remove the cartridges. If you've saved the orange seals, tape them
onto the cartridges, if not then wrap black electrical tape around so it covers the ink outlet and the little air
inlet on top. Only pull it snug across the ink outlet, not tight, and fairly loose on the cartridge body to prevent
I then just stick the head under a stream of hot tap water. I use a soft plastic eyedropper to squirt the above
cleaning fluid into the ink inlet meshes on the head and to flush ink off the bottom of the head. Careful not to
touch the nozzles!
As you squirt cleaning fluid into the screen, a lot will rush back out, that is fine as it is flushing ink and gunk
back out rather than forcing it through the nozzles, which are far finer than a human hair.
When you see little or no more color in the water or cleaning solution, force some of the straight
filtered/distilled water into the screens. Rinse the outside of the print head with straight isopropyl alcohol (99%
is better than 50% for this) and pat dry with a clean cotton towel (-not- paper towels) and again, DO NOT TOUCH THE
Patience is a virtue. I've bought a lot of Canon printers in thrift stores with full cartridges because the heads
clogged, they bought new cartridges, that didn't fix it so they tossed it at Goodwill. I clean them up and for
$12.95 I get $45 worth of brand new cartridges and a backup printer. I only had two heads be unsaveable, those
would print on all nozzles but had sprung internal leaks between two colors, cyan and yellow. The symptom was
yellow nozzle checks print green, and the ink inside the yellow cartridge slowly turns green.
Re: Removing Canon MP730 Printhead
Please try at your own risk -- A word of caution:
The Print head is sitting in a cradle. So do not confuse the cradle with actual print head. The cradle is the one
that slides left and right on the metallic rod. Do NOT try to remove the cradle. Here is the link to canon to get
Make sure to use genuine Canon ink cartidges.
1) Unplug the power to the printer. Remove the USB printer cable.
2) Lift open the top cover by depressing the round button on the right side of the printer; exposing the printer
3)Lift the grey lever on top of the cartridges. This dis-engages the printhead electrical connections. Remove all
the 4 ink cartridges from the printhead. From the cradle hold the printhead from the top and lift the printhead by
tilting it toward you. Make sure not to touch the electrical contacts in the back printhead.
4) Take a small plastic bowl and fill it with 1/4 inch or less with Rubbing Alcohol(70% Isopropyl Alcohol). Dip the
bottom of the printhead in the alcohol. Soak printhead in the alcohol and shake it lightly so the dried ink
clogging the printhead can come loose. Us paper towels to soak excess alcohol from the bottom of the printhead.
Make sure not to damage the printheads.
5) Pour some alcohol from the top of the each inlet of the ink cartridge seat and again soak up any excess alcohol
with paper towel. Let the print head dry up little.
6) Put the printhead back in the cradle and insert back the ink cartridges in their right seat. Lower the grey
lever back into its position so the electrical contacts are made on the printhead.
7) Plug the power and USB port.
8) Print a picture or diagram with color in draft mode. You might have to do this couple of times, so that the inks
starts flowing from the ink cartridge through the print head. Then print the same in high quality. If the heads are
unclogged your printer should work as new.