Panasonic Panafax UF-8100, Service Manual

Page: 106 / 374

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