Panasonic UF-490 Service Manual page 89

4.4.9. Horizontal White Lines
Is the printout in Service
Mode 3 normal?
Is the recording paper damp?
Is the Toner Cartridge/
Drum Unit Assembly
operational?
Are there any foreign particles
or stains on the BTR?
Is the Power Supply Unit
normal?
Are the Fuser and Pressure
Roller surfaces clean?
START
Yes
No
Yes
No
No
Yes
Yes
No
No
Yes
No
Yes
END
P
Check the Scanner mechanism.
Replace the recording paper.
Replace the Toner Cartridge/
Drum Unit Assembly.
1. Clean the BTR with a soft, dry
cloth.
2. Replace the BTR.
1. Check all connectors and
voltages on the Power Supply
Unit.
2. Replace the Power Supply Unit.
Clean or replace the rollers.
89