Read Panasonic UF-585 / UF-595 (serv.man2) Service Manual online
Troubleshooting
131
4.6.2
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.
to a reference fax unit.
Is the LED Array lit?
Does CN1, pin 1 on the
SCA/SCB PCB measure
+24 VDC?
SCA/SCB PCB measure
+24 VDC?
Yes
No
Yes
No
Are CN7 (SCA/SCB PCB)
and CN30 (CCD PCB)
connected properly?
and CN30 (CCD PCB)
connected properly?
Connect them correctly.
Replace the LVPS.
Does nLEDON go Low
when the scan starts?
when the scan starts?
Check CN1 on the SCA/
SCB PCB and the LED
harness.
SCB PCB and the LED
harness.
Does the problem still
occur?
occur?
Replace the LED Array.
The receiving unit may be
defective.
defective.
1. Replace the Scanner
Block.
2. Replace the SCA/SCB PCB.
Block.
2. Replace the SCA/SCB PCB.
Replace the SCA/SCB PCB.
Is the transmitted copy
normal?
normal?
No
Yes
No
No
1. Check CN8 (SCA/SCB PCB)
and CN25 (LCU PCB).
2. Check the telephone line cable.
Replace if necessary.
and CN25 (LCU PCB).
2. Check the telephone line cable.
Replace if necessary.
Does poor transmitted copy
appear when transmitting to
a specific receiver?
appear when transmitting to
a specific receiver?
Telephone line quality is
poor.
poor.
END
Yes
Yes
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