Panasonic UF-890 Service Manual page 134

4.4.3 Vertical White Lines
Is the printout in Service Mode 3
normal?
Is the recording paper damp?
Is the Toner Cartridge operational?
Are there any foreign particles or
stains blocking the Laser Beam
path?
Are there any foreign particles or
stains on the BTR?
Are the Fuser and Pressure
Roller surfaces clean?
START
Yes
No
Yes
No
No
Yes
Yes
No
Yes
No
No
Yes
END
134
P
Check the Scanner mechanism.
Replace the paper.
Replace the Toner Cartridge.
1. Remove the particles from the laser
beam path or clean the stains.
2. Replace the LSU.
1. Clean the BTR with a soft, dry
cloth.
2. Replace the BTR.
Clean or replace the rollers.