Enclosed is scanning from platen cover, the Reddish shading on top rear improved a little after erasing blank margin, but still there. is there anyone know Sp4991 Image Pass Selection, default 2 now after firmware updated, say " RGB RGB image done by shading correction(shading on, black offset ON. Changing to option "5" : RGB image done by line skipping correction as per Service Manual. Machine don't allow to change, keep 2 selection. Is there another sp mode to the filter parameter of CCD?
Thanks
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