How do I stop printer putting horizontal band across the page. This happens when printing and also photocopying. However, after a few photocopies have been made, the lines disappear but not after printed copies have been made.
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try to change the color ink. horizontal banding (the pink or other color lines appearing means horizontal banding) when there is a problem on one of the heating element of the printer head. since almost all canon printers have head built in the inks, replacing the faulty ink will solve the problem. if not then the controller of printhead on the carriage and mainboard needs to be checked.
The exit rollers need to be cleaned, but whats happening is ink is coming from the bottom onto the rollers. It needs to come apart and be cleaned and a mylar strip put in to keep the ink from coming up. A shop repair usually.
I had a problem similar to this where it would print 7/16" horizontal band blank and then a 7/16" horizontal band correctly. This problem occured systematically when printing text.
Called Canon support after a great deal of searching around on the web and they shipped me a new printhead. Problem solved.
If your printer is anywhere near a year or less old call them up and explain the problem. They were very helpful.
Most likely cause is that a roller has degraded during storeage. Measure the distance from the centre of the first band to the second and from the center of the second band to the third. If this dimesion is fairly constant you can work out exactly which roller is causing the problem.
The most likely culprit will be the Photo Conductor Unit. This will give a large dimension - (approx the 29cm??)
A service manual should give you the dimensions (circumferences) of the rollers within the machine. If you have a spare pcu around, put it in and see if it makes ANY difference.