Question about Canon imageRUNNER 5000 Copier

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I have a Canon imagerunner 5000 copier and i replaced the toner about a month ago and whenever i copy alot of copies at one time, it puts clear streaks in the middle of my copies and i can't read half of what it says. What could be the problem and how would i fix it?

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The first thing to try when experiencing these types of problems on this machine is to clean what are called the 'corona wires'. There are 3 sets of corona wires on the machine. The easiest set to see are on beside the transport bed. Open the front door then rack down the green handle and pull the unit towards you. If you look down and just right centre you will see a metalic unit running from the front to the back of the assembly with many wires running diagonally across the unit. Inside this unit is 2 very thin copper wires which can become dirty to the point of needing replacement. You can remove the unit and blow out the dust and waste toner but if you try and clean the very thin wire with a brush or alcohol be very very careful - you may well snap one and replacing it will be almost impossible if you have never done it before. You can by a new unit though. The other two sets are hidden by the front cover above the unit you pulled out but you would really need the service manual to remove them safely.

However, you can perform a wire cleaning procedure as a user and hopefully that will help by pressing the head key (head shpe symbol with a star inside) and then the 'adjustment and cleaning' then select 'clean wires' then the machine will move cleaning pads on each of these assemblies over the thin wires several times and ifthey are not overly dirty, that may well be the solution. Perform this procedure a few times. Good Luck

Posted on Jul 16, 2009

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