Canon Pixma MG5150 color print quality decline

[Łukasz]

The regular print nozzle check pattern is exactly the way it was before the cleaning. So if its up to the ink, the easiest way is to buy an original canon magenta and see if the prints are better, right? Probably this is just a bad batch of ink...right?

Except for price of OEM Magenta ink tank - yes.

Ł.

BTW - perhaps they sold Light Magenta ink?
We have got one report in our country, that someone sold Red dye ink instead of Magenta dye ink for CLI-526.

 

[martin0reg]

Better late than never. Here is the test page. Couldnt fit the whole pic so extracted the colors only. if needed will post the rest of the page. This is after washing the head and two cycles of print head cleaning. To me it seems bad..
View attachment 2126
View attachment 2127
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View attachment 2129

Better show the whole page.
I once had a similar problem, colored letters and weak light bars (also no real stripes) in the normal nozzle check.
In the extended nozzle check the color bars were clearly cut (=electrical damage) .. not like yours...

...BUT there had to be three (!) bars of magenta and of cyan also in the extended nozzle check

1 - extended n c of the one with the colored letters and weak light bars

2 - extended n.c. of a good one (may be except for the blue square..don't really know how it should look like..)


I am not sure what yours should look like...but as the normal n.c. is the same (with three bars for M and C) I would expect also three bars in the extended n.c.

 

[Łukasz]

Extended nozzle print from service mode is OK.
I have checked some old SMode test prints from MG5150 (stored in "hardware" folder) and it has only 2 bars (strange, cause printhead has 3-sizes of droplets).

Also MG5250, MG6250, iP4850/iP4950 also have only 2 bars and iP3600 (one gen older) also have only 2 bars.

Edit:
iP3600 and other x20/x21 ink type printers have 3 pars in extended nozzles check.
But x25/x26 ink type printers have 2 bars, and not more (please see further posts).

Ł.

 

[Aleksandar84]

Here are the lower test figures

what do you make of it?

 

[Łukasz]

To me it looks like Magenta ink tank is filled with Light Magenta Ink (instead of Magenta).

Ł.

 

[PeterBJ]

Light magenta is also called photo magenta, so is your magenta ink bottle labelled "Photo Magenta"?

 

[martin0reg]

Extended nozzle print from service mode is OK.
I have checked some old SMode test prints from MG5150 (stored in "hardware" folder) and it has only 2 bars (strange, cause printhead has 3-sizes of droplets).

Also MG5250, MG6250, iP4850/iP4950 also have only 2 bars and iP3600 (one gen older) also have only 2 bars.

Ł.

MP540 - three bars (and same printhead..or not?)
http://www.printerknowledge.com/threads/need-help-for-my-mp540-printhead.8523/
(see post 7 and 10)

Question remains: is there no third bar intended - or is it missing in the print?

We should make a collection of correct extended nozzle checks - without this it's really difficult to interpret your check

PS: aleksandar, a post of the whole page could help...
The correct version of extended nozzle checks you can find in service manuals...if those are available...

 

[PeterBJ]

MP540 - three bars (and same printhead..or not?)

MP540, iP3600 and more printers use the same QY6-0073 print head as the MP560.

Question remains: is there no third bar intended - or is it missing in the print?

According to the service manual only two cyan and two magenta bars are intended. I don't understand this, maybe it is a program error in the printer's firmware? See post #25 for an example of the extended nozzle check for MP560 from the service manual.

 

[martin0reg]

... See post #25 for an example of the extended nozzle check for MP560 from the service manual.

And see your own post #7 in the other thread I have linked: three bars .. I am stumped ..

(edit) there are two different checks from mp540 to be seen (#7 and #10) - both with three bars!

 

[PeterBJ]

Also note that the extended nozzle check for MP540 does not print yellow on top of cyan. Some other Canon printers do that to make the yellow more visible.

My service manual for the MP540 is the simplified version that does not have an example of the extended nozzle check.