Question about Canon NP6221 Fuser Thermofuse

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What is causing black streak

Black streak on copies

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Usually black streaks are caused by faulty rollers in the fuser assy. Depending on how many prints/copies you have on your current one it may be time to change it.

Posted on Feb 20, 2014

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Canon NP6221 makes copies black and white with black streak down middle. How can it be fixed--works well otherwise.


They are manny cause of black copy.
1.over tone.
2.arching on main charger or dirt on main charger.
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Feb 16, 2014 | Canon NP6221 Fuser Thermofuse

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I have an hp LaserJet 3015 PCL-6 all in one printer, copier & fax. When I use the copy function, there is a black streak running down the length of the copied paper. I tried replacing the toner...


Clean the thin glass strip that sits to the left of the flat bed glass.

That is the glass used when the ADF is being utilized.
There is dirt on it causing the black streak.

Oct 11, 2011 | HP LaserJet 3015 All-In-One Printer

1 Answer

What causes a white streak and faded print to appear on copies?


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.
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Oct 21, 2010 | Canon PC-940 Black and White Copier

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After a few copies are made, black streaks start showing up on the copies and gets worse with each successive copy


for most copier those black streaks are caused by poor cleaning of the Photo Conductor Drum these can be fix by replacing the cleaning blade. after replacing them clean the Photo Conductor Unit and make some test copies.

Feb 27, 2010 | Office Equipment & Supplies

2 Answers

Black Streaks on copy


This means that teflon is wearing off of the Fuser Roller. It collects toner and then tracks it back on everu copy. It needs to be changed out by a trained tech.
The other thing that can cause this is a bad drum. Both about $200 I believe.
Cheers

Dec 29, 2009 | Sharp Office Equipment & Supplies

2 Answers

Copier, Printer black streaks on copy or all black page


Hello sir; Either drum cleaning blade or drum cartridge needto replace.

Aug 20, 2009 | Brother Office Equipment & Supplies

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Copies have black streaks now


Dirt on the narrow glass will cause streaks through the Auto feeder, but copies should be clean if using the main contact glass if that's the case. Dirt/toner anywhere else (ie:laser optics) would cause light areas on the copies- not dark. Did this happen the very first time you used it, or shortly after? In other words, could it be coincidental? It sounds more to me, like the PCU (photoconductor/drum unit) needs replacement, or a fuser roller.
If cleaning the glass doesn't help, then one of these 2 things is causing your problem.

Apr 23, 2009 | Ricoh Aficio 450 Copier

1 Answer

Dirty copies.


Does this streaking problem occur when printing (not copying)? If it does then you are probably looking at a consumable issue. Alot of times black streaking is caused by a defective or spent drum. Is your drum new? There is also a blue piece on the drum unit used to clean the corona wire that cleans the drum. Have you tried moving it back and forth several times?

If the problem only happens when copying and the streaks are as bad as you make them out to be then you problem have a bad CIS unit (scans your originals for faxing or copying)

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Nov 21, 2008 | Brother IntelliFAX 4100 Laser Fax

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HP 7410 streaks when using auto document feeder to make copies


the document feeder of that unit have its own scanner glass. try opening the document feeder and clean the scanner glass with a lint free cloth that is moist with water and also clean the rollers of the document feeder

Aug 13, 2008 | HP OfficeJet 6210 All-In-One InkJet...

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Blank Streaks


streaks are caused either by the toner, drum, lamp or fuser.

If you make a copy and it does not show a streak then it was done by the person sending the fax. BUT, check this,

open door and take out toner cartridge. look for a thin glass that is on the bottom of the machine and wipe it. Toner spills will cause a black streak.

Nov 15, 2007 | Brother IntelliFAX 2800 Laser Fax

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