mp830 pgblk not working, purge unit seems ok

[The Hat]

Thanks very much for the responses. I was afraid it might be more than just a clogged or mis-functioning print-head, ie the logic board you referred to. To answer post #2, I used a new pigment black cartridge in my tests.

If I change the text to be printed to red, for example, it does print. If I select "photo paper" instead of "plain paper", then the document does print black; it must be using the color nozzles instead.

I will continue to use the windex with ammonia-D to see if I can remove any clog.

If there is a problem with the electronic board external to the print-head, then:

What is the part number to be replaced, and where could I get it?
Should I expect some kind of error? I have not seen any error indicated during printing
Is there a test to isolate the problem between a clogged print-head and a defective circuit board.
Could such a problem damage a new print-head?

One last thing- I have been using non-canon ink for the printer, perhaps that suggests something?

Thanks for the help!
Eric

As everybody before me has said this is more lightly to be a print head problem rather than a cartridge and ink failure.
But before you start to get into the realms of buy new cartridges / print head just try one last thing.
Inject I or 2 ml. of Windex directly into the bottom of your large cartridge, pop it back in to the print head and
do one only (Deep cleaning) of the black and not the colours follow that with a nozzle check and that will show
if any of the black ink is visible or not and whether your print head is functioning correctly..

 

[PeterBJ]

The parts number for the printhead is QY6-0061-000

I found it in the parts catalog here: http://www.wraithtdk.com/filedump/MP830/Canon PIXMA MP830 Parts Catalog.pdf

and here is the service manual: http://www.wraithtdk.com/filedump/MP830/Canon PIXMA MP830 Service Manual.pdf