HP LaserJet 9000 Printer series - Manual (Page 129)

Chapter 5 Problem solving 129
Correcting output quality problems
z Make sure that paper is loaded correctly, all adjustments have been made, and the paper is under the
corner tabs (see
“Orienting media” on page 31 ).
z Make sure that paper type and quality meet HP specifications (see “Specifications” on page 164 ).
z If envelopes are creasing, try storing envelopes so that they lie flat.