I have a lanier 6713 that streaks and makes dirty copies. Ive cleaned the coronas and its not any better

Check the drum cylinder for a) a clot of fiber inside the corona wire channel; b) a groove worn into the surface of the coating. If those OK then check the fuser (inside at the back). Look for either a dirty fuser sleeve or a shiney track worn through the coating on the fuser. Dirty can be cleaned - shiney cannot be fixed

Hello,
first the paper can be dirty in a lot of ways...

i.e.

If you have dark "background"or small black dots, the problem is in developer and it need's to be replaced, or cleaning blade or drum.
If you have streaks on copy, the problem can be in drum and cleaning blade or fixing roller.
If the copy is too light, the problem can be in dirty optics or bad transfer corona.

There can be a lot of things... better call service for preventive maintenace, they will change all that is needed according the number of copies that machine has.

Hope that helps!

Sometimes you may see vertical streaks/black lines
on the faxes you receive. Either your FAX/MFC's
primary corona wire for printing may be dirty, or
the sending party's fax scanner may be dirty. Clean
your primary corona wire (see pages 13-18), or ask
the sender to make a copy to see if the problem is
with the sending machine.
Cleaning the Drum Unit
We recommend you place the drum unit on a drop cloth or large piece of
disposable paper to avoid spilling and scattering toner.
1 Carefully turn the drum unit upside down.
2 Clean the primary corona wire inside the drum unit by gently sliding the tab
from right to left several times.
3 Return the tab to the Home
position (  ) before
reinstalling the drum unit.

Sometimes you may see vertical streaks/black lines on the faxes you receive. Either your machine's
primary corona wire for printing may be dirty, or the sending party's fax scanner may be dirty. Clean
your primary corona wire. I recommend placing the drum unit on a drop cloth or large disposable paper
to avoid spilling and scattering toner.
1. Clean the primary corona wire inside the drum unit by gently sliding the tab from right to left several times.
2. Return the tab and snap it into the Home position, (Caution: If the tab is not at the Home position, printed pages may have vertical stripes).
3. Reinstall the drum unit into the machine.
4. Close the front cover.
5. Plug in the power cord first, and then plug in the telephone cord.
or ask the sender to make a copy to see if the problem is with the sending machine.
Try receiving from another fax machine.
If the problem continues, call Brother Customer
Service at: 1-800-284-4329 (in USA) or 1-877-BROTHER (in Canada).

This can be anything from something on the glass to charge corona dirty, laser dirty, drum or blade or fuser rollers need to be replaced. For the average person, the best you can do yourself is to make sure glass is clean. Question..... do you get this line if you're printing also? If yes then that would eliminate the glass and has to be something inside. If no, then look very carefully at the glass and long skinny glass on top, if it has that, for white out or something on the glass. Sometimes you won't even see spot unless you look at just the right angle. Good luck. Please rate this if it helps.

Cleaned the coronas as per instruction book. Done this before but this time it made a difference.

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)

Inkworks
866-381-0541

I'm sorry to tell you, this is likely a drum issue.

You probably need to have a certified engineer examine the machine.

Have you tried speaking with the local service center to see if they have experienced similar issues? It might be free information.

Erik.

Clean the glasses on top!!! Your CORONA lens is dirty!!! it must have some cleaning brush or bar near the side!!!

Sounds like you need a new cleaning blade. It is located inside the process assy behind the drum.