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If they are small random black spots it is most likely toner dropping. Toner dropping can be caused by a number of things but most of the time it is caused by old developer which needs to be replaced and should be done by a copier Tech. This modle machine also had a come problem with the drum cleaning unit backing up and causing damage to the process unit. IF this has happened it is most likely time to purchase a new copier.
It could be a fuser, drum, developer, or transport belt problem among other things. The FS-C5016N is an old model color printer and if the maintenance kit has not been replaced it probably should be. THe maintenance kit contains the items above along with a few others.
if this is an fs3900 tray rerunning the developer thru the machine.
Do this by going into the menus..up and down untill you see others..than right arrow..now up and down untill you see service...right arrow..than up and down untill you see developer..once you see developer hit enter twice...power off than back on machine..it will than recoat the mag roller with toner...good luck
That's a process problem with that machine.
May require a service call .ON and OFF is pretty much all a customer can do and wait for it to setup. NOTE: The problem occurs because of the trickle development system in the machine, making extended lengths of black and white copies / prints does not allow the black developer housing to purge itself of excess waste Toner (Dry Ink) and Developer. There are two solutions for the problem:
Make 1,000 copies / prints of a black and white job, then make 150 copies / prints of full color. Continue making 1,000 copies / prints of the black and white job, then 150 full color, and so on, until the entire black and white job is complete.
Make extended jobs in groups of 100 by making 100 copies / prints of the black and white job, then allowing the machine to cycle down (return to 'Ready') and making the next 100 copies / prints. Continue in this pattern until the entire black and white job is complete.
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