Hello, my m281is printing very light all colors. All supplies are at 90% and the image on the transfer belt is very weak. I removed the toner tray and tried cleaning the laser glass through the exposure slits and tested the same. The unit is very dirty and the machine is left on all the time. I cannot find any documentation on the removal of the laser unit to clean or replace. almost thinking the the machine could be trash. I guess I could run high compressed air not the can stuff, didn't work! Drums and developers are driving.
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