Question about Canon PC-921 Black and White Copier

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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.

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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.
lloyd

Posted on Dec 09, 2009

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Related Questions:

1 Answer

Our copier is copying in light shade. how to make it darker


To adjust the default lighter/darker setting

1. On the LaserJet 3015, press MENU/ENTER.

2. Use the < or the > button to select Copy setup, and then press MENU/ENTER.

3. Use the < or the > button to select Def. Light/Dark, and then press MENU/ENTER.

4. Use the < or the > button to adjust the setting. Move the slider to the left to make all of the

copies lighter than the original, or move the slider to the right to make all of the copies

darker than the original.
5. Press MENU/ENTER to save the selection.

Page 48 of the User Guide has instructions for adjusting the light/dark setting during a copy job.

Also see the Troubleshooting section of the User Guide for other possible reasons for light/faded copies.

If your copies continue to come out too light, you may need to clean the insert a new toner cartridge or change brands of toner. I tried several "generic" toner cartridges and refills, but my prints and copies were always faded or streaky. After going back to genuine HP cartridges, I haven't had any print quality problems.

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Most often on the PC940 this means your toner cartridge is getting low on toner. To prove this is the cause, just remove the toner cartridge and while keeping it relatively level, shake it side to side a few times. This will re-distribute the remaining toner in the cartridge. Re-install and make a copy. The black streak/faded copy should be much better. If so then I would go ahead and get a new cartridge on the way.
Thank You for using Fixya.
Testimonials are always appreciated!
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Bottom of the copies are darker than the top I


There may be spilled toner inside the copier, Free the drum and paper way of toner an ensure the toner container is not over full. do proper cleaning and the copier will be okay.

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The drum, developer and other parts have a certain life that they are good for. After they go beyond that cycle they can start to run dirty, use alot more toner, basically give you problems until a complete maintenance is done. The drum can have permanent light fatigue, even though they look good and in alot of cases one side will start to get darker than the other. You should get an estimate of what it'll cost to have servicing done and compare that with the cost of a new or refurbed machine. If the copier is very old, it might be worth it to get a new one. Good luck, please rate this if it helped you. Thanks

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hi

try this open the copier and remove Toner Cartridges and shake side ways for 5 times and try to make copy,if faded gone its better to replace Toner Cartridges for better copy quality

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1 Answer

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If your toner saver is off and still getting faded quality means you mirrors and Scanning Lamp are not reflecting images properly.
Now if you are handy on printer then you need to take off glass
bb15714.jpg from printer then you need to clean ADF units (mirrors,lense lamp etc)
0a45468.jpg but if you unaware of printer repairing, i highly recommend to call a printer tech who ca fix back it quick.

sometime printer acts weired due to this problem while printer or make copies.

Good luck
and rate all answers.

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