https://community.usa.canon.com/t5/Professional-Photo-Printers/PRO-1000-Nozzle-Check-Pattern-slight-banding-on-CO/m-p/593967#M19479 <P>Six-year-old PRO-1000 with moderate use. The Nozzle Check Pattern appears to be OK except for the CO. It has some horizontal banding toward the bottom of its section (see image). I've done some research and some have said this type of banding is not an issue but I wanted to see if anyone here had an opinion. I don't want to do a cleaning if it's not necessary. Thanks.<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="pro-1000_nozzle_check.jpg" style="width: 999px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/75032i2DF4B02A447A56FC/image-size/large?v=v2&amp;px=999" role="button" title="pro-1000_nozzle_check.jpg" alt="pro-1000_nozzle_check.jpg" /></span></P> Sun, 26 Apr 2026 20:10:42 GMT DDA40X 2026-04-26T20:10:42Z https://community.usa.canon.com/t5/Professional-Photo-Printers/PRO-1000-Nozzle-Check-Pattern-slight-banding-on-CO/m-p/593967#M19479 <P>Six-year-old PRO-1000 with moderate use. The Nozzle Check Pattern appears to be OK except for the CO. It has some horizontal banding toward the bottom of its section (see image). I've done some research and some have said this type of banding is not an issue but I wanted to see if anyone here had an opinion. I don't want to do a cleaning if it's not necessary. Thanks.<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="pro-1000_nozzle_check.jpg" style="width: 999px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/75032i2DF4B02A447A56FC/image-size/large?v=v2&amp;px=999" role="button" title="pro-1000_nozzle_check.jpg" alt="pro-1000_nozzle_check.jpg" /></span></P> Sun, 26 Apr 2026 20:10:42 GMT https://community.usa.canon.com/t5/Professional-Photo-Printers/PRO-1000-Nozzle-Check-Pattern-slight-banding-on-CO/m-p/593967#M19479 DDA40X 2026-04-26T20:10:42Z