Some types of paper have a "correct" side for copying. If the copy quality is not as clear as you think it should be, try copying on the other side of the paper.
Have you performed the full correction with <Auto Gradation Correction>?
Adjust the gradation in order to obtain the optimum print results.
Originals are copied in <Calendar Type Copy> even if <Book Type Copy> is selected (or vice versa).
Are you copying horizontal originals?
For horizontal originals, the front and back sides of the copy will have the opposite top-bottom orientation when <Book Type Copy> is selected. When <Calendar Type Copy> is selected, the front and back side of the copy will have the same top-bottom orientation. (See "2-Sided Copying.")
The alarm sounds or <The memory is full.> appears on the display when making copies.