Servicing Canon i850

  • Thread starter Thread starter Kris
  • Start date Start date
K

Kris

Anyone know how to get the i850 apart ? ..
no obvious screws.
....mines in need of a good clean , dust and ink.

Chris
 
Kris said:
Anyone know how to get the i850 apart ? ..
no obvious screws.
...mines in need of a good clean , dust and ink.
Click to expand...

The printer is held together with molded plastic clips that are part of
the casing.

Look closely at the back and sides, and you'll notice four little slots
with arrows above them. Use a small screwdriver to GENTLY push into the
slots and push the little plastic clips back. This will let you lift up
a bit on the top casing, but you can't remove it just yet so don't lift
too much.

Now while the top casing is loose, lift it a bit and gently pry the two
white plastic trim pieces on the sides away from the casing. You can't
do this until you loosen the top though. Then gently push the side
pieces towards the front and out to release them from the side casing.

Now use the screwdriver in the two front slots that were hidden by the
white trim pieces, and the top casing will come off quite easily.

If you apply power, the printhead assembly will move to the center, and
you can then clean around the parking station.
 
The printer is held together with molded plastic clips that are part
of the casing.

Look closely at the back and sides, and you'll notice four little
slots with arrows above them. Use a small screwdriver to GENTLY push
into the slots and push the little plastic clips back. This will let
you lift up a bit on the top casing, but you can't remove it just yet
so don't lift too much.

Now while the top casing is loose, lift it a bit and gently pry the
two white plastic trim pieces on the sides away from the casing. You
can't do this until you loosen the top though. Then gently push the
side pieces towards the front and out to release them from the side
casing.

Now use the screwdriver in the two front slots that were hidden by the
white trim pieces, and the top casing will come off quite easily.

If you apply power, the printhead assembly will move to the center,
and you can then clean around the parking station.
Click to expand...

Brilliant, thanks Bill. easy when you know how.
Is it normal for the reservoir waste pad at the bottom to be saturated
with ink ? can't see a way to access it so just mopped up excess ink
by pushing some tissues down the gaps.

Chris
 
Kris said:
Brilliant, thanks Bill. easy when you know how.
Is it normal for the reservoir waste pad at the bottom to be saturated
with ink ? can't see a way to access it so just mopped up excess ink
by pushing some tissues down the gaps.
Click to expand...

I don't recommend it to others, but if you're mechanically inclined, it
is quite possible to remove the entire printer mechanism and clean up
the waste ink area. Although it's not really necessary since the ink
dries and settles into the padding, and there is no sensor there to
govern the waste ink volume. It's a messy job too.

If you want to brave the procedure, let me know and I'll post more
details, but remember that it's not at all necessary.
 
Kris said:
Brilliant, thanks Bill. easy when you know how.
Is it normal for the reservoir waste pad at the bottom to be saturated
with ink ?
Click to expand...

Yes. The vacuum pump draws ink through the printhead as part of the
cleaning processing, and dumps it in the waste pad.
can't see a way to access it so just mopped up excess ink
by pushing some tissues down the gaps.
Click to expand...

Just make sure you don't get too rough with it as the cleaning station
is somewhat delicate. Make sure you didn't pull the little rubber hoses
off the vacuum pump or damage them while cleaning.
 
Bill said:
I don't recommend it to others, but if you're mechanically inclined, it
is quite possible to remove the entire printer mechanism and clean up
the waste ink area. Although it's not really necessary since the ink
dries and settles into the padding, and there is no sensor there to
govern the waste ink volume. It's a messy job too.

If you want to brave the procedure, let me know and I'll post more
details, but remember that it's not at all necessary.
Click to expand...

Bill,

I'd love the details - I think the waste area might the cause of my ink
tank contamination problem (I just made a posting describing the problem
in detail).

Thanks,

Mike
 
Michael Brown said:
Bill,

I'd love the details - I think the waste area might the cause of my ink
tank contamination problem (I just made a posting describing the problem
in detail).
Click to expand...

A 'Waste Ink' pad even if it did need replacing would not cause
cross-contamination of your tanks. This printer will also give a waste ink
warning indication when the pad needs service. Generally this is several
years of average use before this happens.

Your issue would more likely be bad ink, bad printhead, or encoder issue
causing the head not to park in the proper area over the purge station.
 
Michael said:
I'd love the details - I think the waste area might the cause of my ink
tank contamination problem (I just made a posting describing the problem
in detail).
Click to expand...

The waste area is down at the very bottom of the printer casing, at the
front right side under the cleaning station motor. I seriously doubt
it's related to the contamination problem you report.

However, the vacuum pump may not be working properly, or the rubber
seals on the cleaning station may not be making a tight seal causing the
vacuum to lose suction, which means the printhead nozzles are not being
cleaned properly.

You may be able to test the cleaning station by putting a few drops of
ink on the bottom of the printhead, let the printer do it's usual
start-up cycle, and see if it sucks away the ink.
 
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