Print a few more pages to see if the problem corrects itself.
Make sure that the environmental specifications for the printer are
being met (see “General specifications” on page 202).
Maintenance might be due. Check this by printing a copy of the
supplies status page (see “Supplies status page” on page 154). If
maintenance is due, order and install the printer maintenance kit
(see “Performing preventative maintenance” on page 93).