HP QMS 1660 - Manual (Page 152)

Media Input
Options
QMS 1660 Print System Reference 6-14
1 Fan a stack of 500 sheets of paper, and align the paper on a
flat surface.
2 Load the paper in three steps as follows:
3 Ensure that the paper stack lies flat, does not exceed the top
limit mark, and is positioned under the retaining clips.
a Up to the bottom limit mark
b Halfway to the top limit mark
c Up to the top limit mark
Top Limit
Bottom
Retaining Clips