Panasonic UF-8100 Service Manual page 106

4.5.2. Poor Transmitted Copy Quality
START
Make a copy.
Is the printed copy normal?
Yes
Perform a transmission test
to a reference fax unit.
Is the transmitted copy
normal?
Yes
Does poor transmitted copy
appear when transmitting to
a specific receiver?
Yes
The receiving unit may be
defective.
END
Ver. 2.1
No
Is the LED lit?
Yes
Are CN (SC, SDR PCB)
and CN (CIS Assembly)
connected properly?
Yes
1. Replace the Scanner Block.
2. Replace the SC PCB.
3. Replace the SDR PCB.
No
1. Check CN (SC PCB),
and CN (FXB PCB).
2. Check the telephone line cable.
Replace if necessary.
No
Telephone line quality is poor.
No
Does +5 VDC alive on the
SDR PCB?
Yes
Does nLEDON go Low
when the scan starts?
Yes
Check CN on the SC,
SDR PCB, and the CIS
harness.
Does the problem still
occur?
Yes
Replace the CIS
Assembly.
No
Connect them correctly.
106
UF-7000/8000
UF-7100/8100
Replace the LVPS.
No
Replace the SC PCB.
APR 2007