Pro 7900 and 9900 Field Repair Guide 10/6/10
Horizontal Banding Printer Component, Software Item, LCD Display, Printer Button Page 225.
If all of the nozzles appear to be functioning properly, the horizontal banding may still be caused by the print head.
Missing or deflected Nozzles may be caused by problems with the Cleaning Station. Before attempting to clear
Nozzle issues, the Cap, Wiper Blade, Wiper Blade Cleaner, and the Print Head Nozzle Plate should be cleaned.
Additionally the Borderless Pads and Flushing Box should be checked to verify that they are not out of position or
dirty. If a build up of contaminants makes contact with the Nozzle Plate, it will cause reoccurring Nozzle drop out.
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