How get rid of faded vertical line on ricol laser printer

Vertical Bands, Lines, or Streaks in Copies, Faxes, or Scans

support.hp.com/us-en/document/c02881567

Figure : Sample output with vertical colored bands or lines ... Remove any paper from the automatic document feeder (ADF) tray. ... To protect the scanner, do not spray the glass cleaner directly on the glass. .... determine if your printer is still under warranty, and then Contact HP Support to schedule a repair or replacement.

How to get rid of lines on a copied page - YouTube

? 2:10
https://www.youtube.com/watch?v=xTJpCg5sHl0
Feb 17, 2010 - Uploaded by Wayne Springer
When you make copies on your copy machine, does it ever leave a black vertical line ... QLS ' How to Eliminate Vertical Linesfrom Scans, Copies & Faxes ... Part 2- Fix or repair color laser printer with fading, light print, or lines ...

Replace the PCU.

Usually replacing the toner cartridge fixes that problem. Sometimes it's the fuser.

If it looks faded with vertical streaks like this,
The problem is with the developer in the imaging unit. The problem can be fixed by either replacing the imaging unit for $100+ or you can fix it yourself by cleaning the imaging unit. You will need simple hand tools and if you are careful restore the print quality of your printer. I have a link to instructions that should help you http://www.fixya.com/support/r4120906-clean_developer_blades_samsung_clp_300 Hope this helps you.

take out your toner , and shake it well then try it, if its ok, order new toner

This is coming from the Black Drum Unit. You may be able to remove the unit and look into the slot on the top. You should see the drum which is green in color and may be able to see the lines. Not much you can do with these units so you may just have to replace it.

Clean the laser unit with a cotton bud

try another toner cartridge

If the issue is occuring in the same place on all prints, try the imaging drum (can't remember if this printer even uses one) or the transfer belt/roller (not sure which it uses). If you phone Dell support, they should run you through troubleshooting and send you either of those parts free of charge if you are under warranty. If not, buy them anyways; they don't degrade over time (if kept in the dark) and can be saved for when the currently installed one runs out if you don't need it to fix this issue.

Toner issue getting to drum - use gen toner cart.

or Drum blade stuffed (lines are down page fro top to bottom- replace drum assy

Drum has been exposed to light faint or blank across copies repeated 4 times down page - replace drum assy

or upper fuser roller stuffed, down page, smudgy print -  replace fuser

LSU(laser) or boards rarely cause issues