Canon ip4000 issue

[Hillyard]

Here seems an uncommon issue but someone might have seen it.

Nozzle check seems normal.
High quality printing seems normal.
On normal quality I get noticeable banding due to the magenta.

Seems to be the case that not all the nozzles are firing in one of the
directions for the magenta (assuming printer has bi-directional printing
for normal and uni-directional printing for high quality?).

What could be the issue here?

Sean

 

[Burt]

Not uncommon. Either a cartridge not feeding as well as it should or
partial printhead clog. Do a few cleaning cycles and, if the problem is
still there, one deep cleaning only. Still a problem? Are you sure that
the problem is the magenta? Color shift would be toward cyan or green in
that case. Put a known good cart in and see if that cures the problem.
Even OEM carts have been known to occasionally feed poorly. If it isn't the
cart, go to the nifty stuff forum, check in, click on the FAQ's at the top
of the screen, and read through the first thread about what to do if your
printer doesn't print properly.
http://www.nifty-stuff.com/forum/

 

[measekite]

Here seems an uncommon issue but someone might have seen it.

Nozzle check seems normal.
High quality printing seems normal.
On normal quality I get noticeable banding due to the magenta.

i have only heard of this from people who use generic ink and that is
before it begins to really clog up

Seems to be the case that not all the nozzles are firing in one of the
directions for the magenta (assuming printer has bi-directional printing
for normal and uni-directional printing for high quality?).

What could be the issue here?

it must be generic ink. i never heard of it happening with canon ink
that has been used exclusively in the machine and never was contaminated

 

[Hillyard]

Almost certainly magenta; only colors that would use magenta show an
issue--cyan, green, yellow, etc. all look fine.

It does not seem to be the cartridge. I also have an i950 and switched
the magenta with no change in performance from either printer. Also,
there is no change in color as the page is printed--I might expect it
to start fading if it was feeding slowly.

I'm also a bit doubtful it's a clog. Missing lines when using normal
quality implies something like 25% of the nozzles not firing (problem
is not a color shift, it is white lines in the magenta--but not in
high quality mode). If it is a clog, then Canon's nozzle check is
essentially useless, as that looks fine when I run it.

Regards
Sean

 

[Burt]

It is apparent that some jets are not delivering ink under certain
circumstances. I believe that the high quality setting does a double
overlapping pass which would print over the clear banding that occurs with
normal quality settings. Clog? poor electrical contact with the print head?
Burned out jet? Bad board? problem ribbon connector? First place I would
look as it is the easiest issue to deal with at home is a minor clog. Look
at the techniques on the nifty-stuff forum as I suggested.

 

[Hillyard]

Thanks for your help.

The clear banding is wide enough (and with no ink at all) that I really
would expect to see a difference from a double pass type of situation--
if that is the high quality technique.

In any case, I did try some cleaning of the print head in
windex--pressing on saturated paper towels. I think it helped the
overall quality of the prints (generally looks a bit sharper), but did
nothing to help this issue--no difference at all; I'll be darned if I
can see any shrinkage of the bands or any evidence of additional nozzles
firing.

Regards
Seam