Poor Printed Copy Quality - Panasonic UF-490 Service Manual

4.4.14. Poor Printed Copy Quality

Is the Test Pattern printout
in Service Mode 3 normal?
Make a local copy.
Is the printed copy correct?
Perform a receiving test
with the reference fax unit.
Is the received copy correct?
Is a poor copy printed only
when receiving from a
specific transmitter?
The transmitting machine
may be defective.
START
No
Yes
No
Yes
No
Yes
No
Yes
END
1. Replace the SC PCB.
2. Replace the Laser Unit (LSU).
3. Replace the Power Supply Unit.
4. Replace the Toner Cartridge
and/or Drum Unit.
Check the connections of connector
on the CIS and CN3 on the SC PCB.
1. Check the Telephone Line Cable.
2. Replace the SC PCB.
Telephone line quality is poor.
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