Black stripe across copy

A laser printer has its rollers (which I believe you said you cleaned...very important) and the cartridge you put in the printer has rollers too! Carefully check them and the wiper on the cartridge. If all of those things are clean, then you should get clean copy!

something could be blocking the primary chargeing corona wires/roller. i see it a lot on the ir 5000 when the primary corona assmbly cleaning pads get stuck half way through the cleaning cycle.

Sir,

If you place and orginal on the large glass and may a copy does the strip dissapear? If not it could be cleaning blade drum fuser unit? If the strip does leave then you have a problem with the docfeeder glass small long glass next to the big glass. Clean it!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

I received an answer elsewhere. Thank you.

Hi, first if you mean length of the page, remove the ink cartridge and see if a piece of paper is stuck on the roller where the power comes onto the paper, in line with that white line on the copy.

Try leaving the cover open and run a test scan, once with a fresh sheet as the item to be scanned and then a second time without anything on the table.  You may see what is blocking the light source or possibly a defect in it.
Scanning is done left-right, left-right across the width of the page and the vertical stripe indicates that the blockage is present during each scanned line.
In servicing copiers and multifunction machines, I have found a number of curious contaminents, one of the most annoying was a moth, still alive, that would randomly sit on the lamp, causing some pages to come out OK, others not. 
If your copies and printouts are coming out fine, then only the scanner can be at fault.

If you lift up the lid on your scanning device you will notice a glass strip about 1 inch thick and then the large area of glass used for flatbed scanning. The 1 inch strip is used for ADF scanning. Because your papper is moving across the glass strip, any dot, smudge or scratch will affect your scanning and cause verticial lines down the page. Sometimes the dot is not visible to the eye. Get some glass cleaner that has alcohol in it and thoroughly clean the glass strip and it should solve your problem. If it turns out to be a scratch on the glass then cleaning won't help.

There is a small strip of glass on the left side directly under the edge of the scanner, About a half an inch wide. It has something on it.
May be very hard to see, use a strong glass cleaner or some alcohol and a regular piece of paper to clean it with.

There must be a strip of glass about one inch wide, next to
the large glass. There is the problem !
Clean that strip thourougly. When you use the feeder the pages
are scanned thru the small strip of glass.

Even a single grain of dust or a single strand of hair on the scanning glass will cause the scan head to perceive ink/image where there is none. Deffinetly try cleaning the glass using a good window cleaner, and a cloth that is completely clean, or even a peice of newspaper. If the black line remains, I would suggest taking it into a service center to have the scan head itself cleaned.