Question about Canon NP 6035 Copier

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Copies are coming out with a dark shadow. How do I solve this problem?

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There are several options as to the causes of this print defect. If the entire page background is grey or shaded, these are your most probable defects:

- Your toner cartridge is defective and spilling toner, in which cae you just swap it out.
- The high voltage power supply isn't getting the correct voltage to the rollers. (change the high voltage power suply)

If each letter seems to have a small shadow, then consider these options:

- IT could also be your toner cartridge
- The transfer roller might have trouble. Clean the Transfer Roller using a dry, lint-free cloth. DO NOT touch the Transfer Roller with your fingers. If the problem persists, replace the Transfer Roller Assembly.

Before any of this, check your settings. The print density and media type may cause errors like these if they are set improperly.

Hope this helps! Good luck!

Posted on Sep 10, 2010


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Copier acted like it needed new toner cartridge, but when I replaced, copies are still very faded. When I adjust for darker copy, then I end up with dark shadows. This is Canon PC 921.

the 1st thing you need to determine is where the faint copies are coming from. is it copies or prints (from your PC.

if its the just the copies that are faint it is could be due to the optic section (these are the mirrors in the scan unit). if you have these cleaned with either an alcohol or ipa solvent this should bring your copy quality back to normal.
if you are having faint prints then it could be 1 of 2 things. either the transfer section (in laymen terms it pulls the toner from the drum onto the paper) has a poor connection/needs replacing. the other reason for this could be the charge unit that will be situated next to the drum. this over time will need to be serviced. be carefull with this part 1stly as the drun cant be in the light for to long and 2ndly the charge wire is a very fine and delicate wire. this can be cleaned and could get copy/print quality back to stardard, all that this needs to solve the problen is a service (clean charge wire and transfer roller or replece parts.

i hope this i more help than you need and you can get the problem sorted.

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Hi Scottie,
Please clarify if the darkness is like a darkened background or like streaks across the page... If it is the former you will just require a clean of the optics, if the later then a drum cleaning blade will probably do the trick...

Please let me know if I can help further .

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As your machine analogue it will suffer greatly from dust build up on the mirrors and this will cause dark copies and shadowing particularly bad on the edges.

Turn the power off. Remove the glass and carefully clean the mirror with a cloth. Do not scratch the mirrors and try not to move the lower mirrors as in some copiers they can cause it to go out of alignment.

It may be other things but this is the most likely and the only one you can fix.

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