Panasonic UF-890 Service Manual page 133

4.4.2 Blank Copy
START
Is the printout in Service Mode 3
normal?
No
Is the Toner Cartridge operational?
Yes
Are there any foreign particles or
stains on the BTR?
No
Is the HVPS normal?
Yes
Are there any foreign particles or
stains blocking the Laser Beam
path?
No
Is the LPC PCB normal?
Yes
END
Yes
Check the Scanner mechanism.
No
Replace the Toner Cartridge.
Yes
1. Clean the BTR with a soft, dry
cloth.
2. Replace the BTR.
No
1. Check all connectors and
voltages on the HVPS.
2. Check the Spring Connector
and voltage on the HVPS.
3. Replace the HVPS.
Yes
1. Remove the particles from the
laser beam path or clean the
stains.
2. Replace the LSU.
No
1. Check all connectors and
voltages on the LPC PCB.
2. Replace the LPC PCB.
133