Panasonic UF-9000 Service Manual page 107

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. 1.0
No
Is the LED Array lit?
Yes
Are CN (SC PCB)
and CN (CCD PCB)
connected properly?
Yes
1. Replace the Scanner
Block.
2. Replace the SC 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 +24 VDC alive on
the SC PCB?
Yes
Does nLEDON go Low
when the scan starts?
Yes
Check CN on the SC
PCB and the LED
harness.
Does the problem still
occur?
Yes
Replace the LED Array.
No
Connect them correctly.
107
UF-9000
DP-180/190
Replace the LVPS.
No
Replace the SC PCB.
JAN 2004