User Manual

ENWW Correcting print-quality problems 129
Wrinkles or creases
1 Print a few more pages to see if the problem corrects itself.
2 Make sure that the environmental specifications for the printer are being met. (See “General
specifications” on page 195.)
3 Turn over the stack of paper in the tray. Also, try rotating the paper 180
o
F.
4 Make sure that paper is loaded correctly and all adjustments have been made. (See
“Loading trays” on page 42.)
5 Make sure that the type and quality of the paper you are using meet HP specifications. (See
“Paper specifications” on page 182.)
6 If envelopes are creasing, try storing envelopes so that they lie flat.
Vertical white lines
1 Print a few more pages to see if the problem corrects itself.
2 Make sure that the type and quality of the paper you are using meet HP specifications. (See
“Paper specifications” on page 182.)
3 Replace the print cartridge.
Tire tracks
This defect typically occurs when the print cartridge has far exceeded its rated usage of
12,000 pages (HP LaserJet 4200 series) or 18,000 pages (HP LaserJet 4300 series)-for
example, if you are printing a very large quantity of pages with very little toner coverage.
1 Replace the print cartridge.
2 Reduce the number of pages that you print with very low toner coverage.
White spots on black
1 Print a few more pages to see if the problem corrects itself.
2 Make sure that the type and quality of the paper you are using meet HP specifications. (See
“Paper specifications” on page 182.)
3 Make sure that the environmental specifications for the printer are being met. (See “General
specifications” on page 195.)
4 Replace the print cartridge.