Panasonic UF-890 Service Manual page 136

4.4.5 Vertical Dark Lines
Is the printout in Service Mode 3
normal?
Is the Toner Cartridge operational?
Are there any foreign particles or
stains on the BTR?
Is the LSU normal?
Are the Fuser and Pressure Roller
surfaces clean?
START
Yes
No
No
Yes
Yes
No
No
Yes
No
Yes
END
136
P
Check the Scanner mechanism.
Replace the Toner Cartridge.
1. Clean the BTR with a soft, dry
cloth.
2. Replace the BTR.
Replace the LSU.
Clean or replace the rollers.