Rockhopper II head issue shown up in nozzle check

[Plottermike]

Secand problem on my RHII (Falcon Outdoor II):
Doing a nozzle check - almost all nozzles are present (3-4 are sometimes missing) BUT:
In the "2" section where the yellow nozzles are shown (7th pattern of right side),on the upper 2 lines are black lines.

Also having magenta and cyan sprays on the sides of the print in 720dpi mode. No sprays on 1440dpi...

 

[wunder]

but whats your Maschine Setting 1x6 or 2x4 CMYK and OneColorOneHead ........??? you can speak german in PrivatMail

best regards
wunder

 

[Plottermike]

It is a 2xCMYK machine with 4 heaters.
In another thread i read about electronical adjustment or so? Maybe this is the solution?

Aunt Edit: The Head is a DX4 (4pcs with 2channels)
YOurs,

Mike