Sharp UX-460 Operation Manual page 134

Problems and Solutions
The quality of copies is poor
and/or black spots appear.
Reception/copying is
interrupted.
A received document or
copy prints out in strips.
132
Any dirt or material on the scanning glass will
cause spots to appear on copies and
transmitted faxes. Clean the fax print head and
the scanning glass as explained in Chapter 10.
If reception or copying takes place continuously
for a long time, the print head may overheat.
Turn off the power and let it cool down.
Make sure the operation panel and the printer
compartment cover under the operation panel
are completely closed (press down on both
sides of each). (To close the printer
compartment cover, grasp the top of the
operation panel and pull to open it, and then
press down on both sides of the printer
compartment cover.)