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1st the basic cause of dark/grey copies DUST. Clean w/ alcohol cloth then dry cloth totally all mirrors and the platen glass both side. If still dark check the "Optic slit " right in the upper of your halogen lamp remove it, still dark Check your halogen lamp maybe it already oxidized. The last solution adjust the CVR .
Hi Scottie, Please clarify if the darkness is like a darkened background or like streaks across the page... If it is the former you will just require a clean of the optics, if the later then a drum cleaning blade will probably do the trick...
Do the copies come out totally black or just dark???? Does the copiers scanning lamp turn "ON" when you go to make a copy? If you smell something burning, you may have paper wrapped around the upper fixing roller...
Dirt on the narrow glass will cause streaks through the Auto feeder, but copies should be clean if using the main contact glass if that's the case. Dirt/toner anywhere else (ie:laser optics) would cause light areas on the copies- not dark. Did this happen the very first time you used it, or shortly after? In other words, could it be coincidental? It sounds more to me, like the PCU (photoconductor/drum unit) needs replacement, or a fuser roller. If cleaning the glass doesn't help, then one of these 2 things is causing your problem.
Sounds to me like the drum needs replacing, and likely the developer too. There is probably a haze of toner still on the drum. You can check by opening the right side cover and looking at it. Is there toner on the drum (green cylinder). It may not be too obvious depending on how dark the copies are. GENTLY wipe a tissue across it after making several copies - it should be clean if the drum is functioning properly. If it is, it could be the fuser that is wearing out, but I'm leaning toward the drum. As I said, if you need to replace this, it is a good idea to do developer at the same time, because these machines tend to be a little sensitive.
bit vague...Cq not good? What does that mean? Light copies> could be related to toner or ROS unit (laser unit) if prints OK but copies U/S clean mirrors and ccd lens Dark copies , streaking? Cleaning blade /drum unit U/S or could be streaking from fuser roll Patchy copies , dark edges, light edges ??????? more detail please