When printing anything, there are about 4 or 5 vertical red colored lines. Have switched out all four cartridges to no avail. All appears very clean inside almost new printer.
This may not be much help, but you can try this link for information.
http://www.laser-printer-reviews.org/A3_11x17_color_laser_printers/QMS_Tektronix_color_laser.htmlhttp://www.laser-printer-reviews.org/A3_11x17_color_laser_printers/QMS_Tektronix_color_laser.html
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