Question about Panasonic Panafax UF-790 Plain Paper Laser Fax

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The fax streaks

The papers that come off have a long black 1 1/2" streak down the left side, from top to bottom. Is there away to fix this?

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Open the lower part of the number panel by pulling up 1 inch. and clean the small scanner glass.....hard to see.

Posted on Mar 04, 2009

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I'm noticing black streaks in my copies, how do i clean it?


Open the feeder from the top of the machine...you will see a thin strip of glass maybe 1/2" wide running from the rear of the machine to the front..odds are there is glue/dirt/corrector fluid or some other dirt on the glass. Clean this off.

Dec 07, 2012 | Muratec F320 Plain Paper LED Fax

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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

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We have a Brother intellifax 4750e. When we send a fax, there is a black streak down the right hand side of the paper. When we receive a fax, the streak is not there. The streak is about 1" wide. ...


Try cleaning the rollers with rubbing alcohol using a good quality paper towels, I find there is a buildup on the rollers causing streaking on the paper. If that fails the print head must be suspect.

Dec 30, 2010 | Brother Office Equipment & Supplies

1 Answer

Black streak down right side of outgoing received fax


clean the scanner, it may have white out or some other obstruction blocking it

Jun 02, 2010 | Brother IntelliFAX 4750 Plain Paper Laser...

1 Answer

Black streaking down one side


You need to open the front cover of the machine and remove the cartridge (drum and toner) On the top right there is a tab that you need to slide from left to right about 20 times, then bring back to home position

Apr 10, 2010 | Brother IntelliFax-4100e Fax

1 Answer

Faxed documents come out with black streaks on them


Clean the corona wire on your drum unit. It should be a blue tab on the top of the cartridge that you can slide from side to side. Make sure that the blue tab returns to the starting position (there should be an arrow on the tab that will match up with an arrow on the drum unit). If this doesn't work, replacing the drum unit should fix it. Drum units are only meant to last ~4 toner section replacements.

Dec 12, 2009 | Brother IntelliFax-2820 Laser Fax

1 Answer

I'm getting black streaks down the left side of the paper. There is plenty of toner left in the cartridge. We've vacuumed out the printer, cleaned the drum - nothing helps.


black streaks the toner cartridge is leaking from the left side which is easy to check pull the tone and look at the gears on the left side to see if toner is present. if these gears have toner on them the cartridge is leaking replace it. check the fuser for wear marks on the hot roller which is the top roller when these get worn through the outer coating they will create black streaks

Dec 05, 2009 | Lexmark E238 Laser Printer

1 Answer

Clp-500. toner streaking the paper.


I have the same streaks problem. Any solutions?

Nov 14, 2009 | Samsung CLP-500 Laser Printer

1 Answer

Printer prints a black streak down the reverse side


You have a build up of ink inside the printer. I had a Canon that did this. I had to take the ink & print head out, and tear a paper towel strip 1 " wide and 13" long or however long the paper towel is. I folded it in half down the length so it was 1/2x13. Then used a plastic strip to shove it under the part the print head sits in. Once I got the towel to the other side, I grabbed it with my hand. I removed the plastic strip used to shove the paper towel under. So now the paper towel sticks out both sides underneath the print head cradle. I gently pull the paper towel back and forth so the paper towel can clean off the ink build up. Hope this helps.

Mar 29, 2009 | Office Equipment & Supplies

1 Answer

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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