What would be the cause for black thin line. Starts just below half way point of copy on a mutli-copy run then continues but moves down to the bottom 1/4 of the page and stays there. If I run throught the by-pass the line appears at top of copy. Only shows up on letter 8.5x11R. Customer doesn't run legal not sure if it happens on legal paper. Doesn't happen on 11x8.5 runs??? Did replace the drum blade.
Thanks!!!
Thanks!!!
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