Really Loud Grinding Noise When Printing

[TammyL-Xerox]

Helo ehong, 

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[ehong]

I was printing some documents today and out of nowhere my Xerox Phaser 6510 started making a really loud grinding/buzzing sound and it was still printing but the printed papers had track marks and toner smear marks in random places. The noice starts right when I send a job to the printer and stops after the printing stops. I made sure there isn't a jam anywhere nor was there any jam reported to cause this. I really need this printer to work for my business. Please can someone help me fix this? The device is 2.5 years old and was working flawlessly until today.