Oki Colorpainter M64 Clogged nozzles

[Bill72]

I have a Oki Colorpainter M64 IP-6620. Cyan print head has steadily gotten worse over the last year. I've attached pictures of the nozzle prints and print head quality test. Replaced cap 2 times, one of those times actually had to replace entire capping unit. Done hundreds of fill cap with ink and let set, and strong cleaning pH recoverys. Caps test fine. I've gotten by with using better quality print modes but its to the point now that quality mode has heavy banding in blues and greens and purples, High quality is even starting to band. Before I buy another print head does anyone have a "more aggressive" method for unclogging the nozzles?

 

[danno]

Back in the day, we would put the head in a cleaning solution bath and hook a line into the supply port on the head. We would then put a syringe on the line and draw the cleaning solution through the nozzles into the syringe. Not sure you can accomplish that with those heads.

 

[MelloImagingTechnologies]

Cyan is the head that goes first.
If you have grey you can use the grey head to replace the cyan head and boot into service mode and make it a 6 color printer,
Bruce

 

[Grizzly]

Ours did that too but overnight. From good to bad. We think it was an electrical issue.