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clean laser... if still there change drum.. if still there clean ccd... if still there... contact brothers support and they will walk you through it or send you to a service center for it to be repaired
Try to copy a document. If the copy comes out black then the the
scanner is dirty. Clean the scanner glass (products on the market that
clean by sending through the scanner) and try to copy again. If after
cleaning the scanner, the copy is still black you have a scanner issue
and the laser/scanner unit will need replacement. Best of luck and
please post back with any questions or just to rate the solution.
this is a very common problem. You have to clean the scanner lamp glass. There must be some dust or correction fluid if you have ever used which has stuck on the glass of the scanner lamp which prevents the light from falling onto the originals. Lift the control panel, you will find the scanner lamp where theoriginals are normally fed, clean with a soft cloth and alcohol.
It sounds like the CIS (scanner) has failed in both machines. Its no generally not a common problem. I would change one every six months if I was lucky.
It may point to something in your environment. I have have seen rust build up on the contacts of the scanner cause this problem. So if you have high moisture or are close to the ocean this maybe a problem.