Poor Printed Copy Quality - Panasonic UF-6300 Service Manual

4.4.14. Poor Printed Copy Quality

Is the received copy correct?
START
Is the Test Pattern printout
in Service Mode 3 normal?
Yes
Make a local copy.
Is the printed copy correct?
Yes
Perform a receiving test
with the reference fax unit.
Yes
Is a poor copy printed only
when receiving from a
specific transmitter?
Yes
The transmitting machine
may be defective.
END
No
1. Replace the SC PCB.
2. Replace the Laser Unit (LSU).
3. Replace the Power Supply Unit.
4. Replace the Toner Cartridge .
No
Check the Transmission Block
(CN30 on the CCD PCB and CN7 on
the SC PCB.
No
1. Check the CN18 on the SC PCB.
2. Check the CN28 and 29 on the
MJR PCB.
3. Check the Telephone Line Cable.
4. Replace the SC PCB.
No
Telephone line quality is poor.
(Refer to 4.6.)
107