Printed Copy Quality Problems - Panasonic UF-490 Service Manual

4.4.

Printed Copy Quality Problems

4.4.1. Black Copy
Is the printout in Service
Mode 3 normal?
Is the Toner Cartridge
operational?
Is the Power Supply
Unit normal?
Is the SC PCB normal?
START
Yes
No
No
Yes
No
Yes
No
Yes
END
Check the Scanner mechanism.
Replace the Toner Cartridge.
1. Check all connectors and voltages
on the Power Supply Unit.
2. Check the contacts between
PSU and Toner Cartridge.
3. Replace the PSU.
1. Check all connectors and voltages
on the SC PCB.
2. Replace the SC PCB.
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