Operation Manual

1. Make sure that the type and quality of the paper you are using meet HP specifications.
(See
Paper specifications.)
2. Make sure that the environmental specifications for the printer are being met. (See
Operating environment.)
3. Turn over the stack of paper in the tray. Also, try rotating the paper 180°.
4. Do not use paper that already has been run through the printer.
5. Decrease the toner density. Open the Configure Device menu at the printer control
panel. Open the Print Quality submenu and change the TONER DENSITY setting. (See
Print Quality submenu.)
6. Open the Configure Device menu at the printer control panel. On the Print Quality
submenu, open OPTIMIZE and set HIGH TRANSFER=ON. (See
Print Quality submenu.)
Random image repetition
If an image that appears at the top of the page (in solid black) repeats further down the page
(in a gray field), the toner might not have been completely erased from the last job. (The
repeated image might be lighter or darker than the field it appears in.)
● Change the tone (darkness) of the field that the repeated image appears in.
● Change the order in which the images are printed. For example, have the lighter image
at the top of the page, and the darker image farther down the page.
● From your software application, rotate the whole page 180° to print the lighter image first.
● If the defect occurs later in a print job, turn the printer power off for 10 minutes, and then
turn the printer power on to restart the print job.
ENWW Correcting print-quality problems 137