I have PIXMA iP8720 printer that prints double lines for text. The print out for the nozzle check shows the PGBK lines horizontal OK, the vertical lines start OK then split into two lines for most of the chart then merge back to a single line at the end.there are no gaps in anywhere in the total pattern, just the vertical lines separating and then going back together. I have done all of the maintenance options in the driver. If I print documents in photo mode there is no problem.
