Digital BW, The Print

Yes. I had similar experiences with an old EP1200. It had a single nozzle I could never clear after using paper towel in that way. I finally removed the head from the machine, put a plungerless syringe full of flushing fluid on that chamber and applied a very strong vacuum to the nozzle side. That cleared it and after replacing it in the machine I got all nozzles firing. Unfortunately,I must not have gotten the ribbon cable securely back into the head because about half way through the first good print the machine crashed. Yep.....You got it, the main board blew. I replaced it and the head with components from an old EP750 I came across and it now works well. I still have the board and head and I may sometime repair the board and put it and the head into the old 750 to check them both.

I'm never dismayed by failed experiments but I do, at times, regret the time lost that might have been used more productively.

Regards,
Duane


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tom Mallonee" <tom@...> wrote:
>
>  
> The chemistry sounds great to me, too. My carpet guy uses a foaming alcohol
> mix to remove my many ink boo-boos. I couldn't find the post quickly, but I
> believe someone mentioned using paper or paper towel soaked in Windex and
> then dragging the head over it. I have ruined two 7000 heads and one 7800
> head by doing this. In all cases, the same one or two nozzles would simply
> never fire, even after trying every other method for a couple weeks,  and I
> had to replace the heads. I'm pretty certain that I jammed paper towel
> fibers or something into a couple of nozzles. Whenever I've been compelled
> to do it, I do it gently with a lint-less PecPad. I would consider this a
> last resort as I do the syringe. In more than one case, the little hose from
> the syringe came loose and I sprayed the head circuit board, once blowing up
> the head circuit board, and another time blowing the head and the machine's
> main board. Over the years I've blown up at least 5 main boards and other
> expensive components by being a bit too aggressive and curious. I like
> blowing things up, but after a while one must grow up. Sigh.
>  
> Tom
>