banding on Latex 310

I'm running a solid print on a matte coated stock. It's set for 10pass_CMYK_90. I'm using the HP coated 3in core ICC profilt. I can't seem to get rid of the banding issue when running a solid. See attached photos. Any suggestions?

Hi pideas! I would follow the recommendations from the User Guide about Horizontal Banding: Latex 310 User Guide (page 112) 1. Issue on the pens, nozzles out. You need to clean and align printheads: Image-quality maintenance > Clean printheads > Print test plot Image-quality maintenance > Clean printheads > Clean All Image-quality maintenance > Align printheads > Auto-ph alignment (SAV media loaded) 2. Issue on the media-advance. Substrate-advance adjustment is highly recommended for 310 and 330 printers as the substrate advance is not automatically monitored by the substrate advance sensor: Image-quality maintenance > Substrate advance calib > Print adjustment plot. If you are using a print mode with ten passes, try increasing the number of passes to twelve. Some degree of banding can be expected with few passes. Furthermore, if you haven’t update your firmware to 6.2.10 version, I will do so we highly recommend to do it. I hope this will solve your question.