I am having a problem with a mx-3111u copier. I had a error code L4-06. I referred to Sharp Technical Bulletin MFP-TB-1272 and changed the parts out accordingly. At first the L4-06 stayed on. Then I moved the gears on the back of the primary transfer belt and reinstalled and the L4-06 went away the machine came to ready state. When I made a black copy,the copy was real faint at first then blank. When I made a color copy, The yellow was ok, the magenta was blurred and the cyan was blurred ( white void areas when supposed to be solid). So I took the main drive unit back out and reinstalled and yellow magenta and cyan are solid now but black is real faint when I do test command 64-01 When I make a black copy it comes out real faint on the first copy and blank each copy after that. What can I do to get the black copy back. Thanks for your help
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