Sharp FO-4400 Fax "causes roller marks paper printing" Questions

marks going down 4-9 pages at a time adn there were also some perfect pages, but few. I have cleaned the white strip and the glass light bar to no effect. We are still getting the black mark. It looks

...paper. But more than anything I suspect a fuser finger, or even the roller baing bad. The fuser is located inside the right door, on top. It is VERY HOT, you can remove it with the 4 silver phillips ...

roller marks there as well. I have cleaned all the glass, registration roller, vacuumed out the inside, made certain the charger cleaner is in the locked position, I have put a new toner cartridge in

...roller having picked up some ink and making that mark until its clean. The rollers, just open your machine and locate all the rollers visually, Dampen a cloth with some alcohol and wipe them. The ...

roller. If it does still have the marks, most laser faxes have a thin strip of glass in between the laser unit and the drum. Some even have a small mirror. May just be a dirty glass / mirror. Take out

"poor line condition' I have a strange proboem with this fax. On two occasions now I could not fax to numbers I had faxed before. I get the message 'poor line condition'. However, in the next instance