Panasonic UF-890 Service Manual page 137

4.4.6 Horizontal 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?
Is the HVPS normal?
Are the Fuser and Pressure Roller
surfaces clean?
START
Yes
No
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
END
137
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.
1. Check all connectors and
voltages on the HVPS.
2. Check the Spring Connector
and voltage on the HVPS.
3. Replace the HVPS.
Clean or replace the rollers.