Poor Transmitted Copy Quality - Panasonic UF-585 Service Manual

4.6.2

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
No
Is the LED Array lit?
Yes
Are CN7 (SCA/SCB PCB)
and CN30 (CCD PCB)
connected properly?
1. Replace the Scanner
Block.
2. Replace the SCA/SCB PCB.
No
1. Check CN8 (SCA/SCB PCB)
and CN25 (LCU PCB).
2. Check the telephone line cable.
Replace if necessary.
No
Telephone line quality is
poor.
No
Does CN1, pin 1 on the
SCA/SCB PCB measure
+24 VDC?
Yes
Does nLEDON go Low
when the scan starts?
Yes
Check CN1 on the SCA/
SCB PCB and the LED
harness.
Does the problem still
occur?
Yes
Replace the LED Array.
No
Connect them correctly.
Troubleshooting
No
Replace the LVPS.
No
Replace the SCA/SCB PCB.
131