Blank Copy - Panasonic UF-490 Service Manual

4.4.2.

Blank Copy

Is the printout in Service
Mode 3 normal?
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 there any foreign particles
or stains blocking the Laser
Beam path?
Is the SC PCB normal?
START
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
END
Check the Scanner mechanism.
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. Check the Spring Connector
and voltage on the Power
Supply Unit.
3. Replace the Power Supply Unit.
1. Remove the particles from the
laser beam path or clean the stains.
2. Replace the Laser Unit (LSU).
1. Check all connectors and
voltages on the SC PCB.
2. Replace the SC PCB.
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