Panasonic UF-890 Service Manual page 142

4.4.11 Voids in Solid Areas
Is the recording paper damp?
Is the Toner Cartridge operational?
Are the Fuser and Pressure Roller
surfaces clean?
P
START
Yes
No
No
Yes
No
Yes
END
142
Replace the recording paper.
Replace the Toner Cartridge.
Clean or replace the rollers.