Panasonic UF-E1 Service Manual page 71

4.3.5. Information Codes: 408, 409, 417, 418, 490
START
Is communication with the
reference unit successful?
Yes
Is the unit transmitting or
receiving?
Receiving
Change Function Parameter #39:
Increase Error count.
No
Does the problem still occur?
Yes
Change Function Parameter #21:
Reduce Rx Sensitivity Level
No
Does the problem still occur?
Yes
Change Function Parameter #23:
Reduce Rx Modem Speed
No
Does the problem still occur?
Yes
Change Function Parameter #24:
G3 Rx Equalization
No
Does the problem still occur?
END
No
Transmitting
Change Function Parameter #20:
Reduce Tx Attenuation Level
Does the problem still occur?
Yes
Change Function Parameter #22:
Reduce Tx Modem Speed
Does the problem still occur?
Yes
The telephone line may have a high
Yes
level of white noise and/or frequent
impulse noise. Ask the telephone
company to check the line.
67
1. Replace the SC PCB.
2. Replace the NCU PCB.
Does the problem still occur?
Yes
Have the telephone line checked.
No
No
UF-E1
No
END