Sony pvp-msh Manual De Usuario

Printed images may have red, blue, or white dots or thin lines on their
surface due dirt or dust entering the printer. This is not a malfunction.
These symptoms may become worse depending on the storage conditions
of the print paper or print cartridge.
See “Precautions” for details when handling print paper and the print
cartridge.

We recommend that you clean the printer heads with the head cleaner
(supplied) when you exchange the print cartridge.  If printed images have
thin lines, remove the print cartridge, and clean the heads.  Handle the
print cartridge with care. See “Inserting the print cartridge” for details
when inserting the print cartridge.

Insert and remove the head cleaner several times to clean the printer head.
Store the head cleaner in the specified case (supplied) after cleaning the
printer head.