Panasonic UF-580 Service Manual page 95

4.3.5. Information Codes: 408, 409, 417, 418, 490
START
Is communication with
the reference unit
successful?
Is the unit transmitting or
receiving?
Change Function
Parameter #071: Increase
Error Tolerance
Does the problem still
No
occur?
Change Function
Parameter #011: Reduce
Rx Sensitivity Level
Does the problem still
No
occur?
Change Function
Parameter #018: Reduce
Rx Modem Speed
Does the problem still
No
occur?
Change Function
Parameter #013: Increase
G3 Rx Equalization
No
Does the problem still
occur?
END
No
Yes
Transmitting
Receiving
Change Function
Parameter #010: Reduce
Tx Attenuation Level
Does the problem still
occur?
Yes
Change Function
Parameter #017: Reduce
Tx Modem Speed
Does the problem still
occur?
Yes
Change Function
Parameter #014: Increase
G3 Tx Equalization
Does the problem still
occur?
Yes
The telephone line may have
Yes
a high level of white noise
and/or frequent impulse noise.
Ask the telephone company
to check the line.
1. Replace the MJR PCB.
2. Replace the SC PCB.
Does the problem still occur?
Check the telephone line
condition.
No
Yes
No
Yes
No
Yes
95
No
Yes
END