Panasonic UF-490 Service Manual page 73

4.3.4. Information Code: 416
Is communication with the
reference unit successful?
Change Function Parameter
#011: Reduce Rx Sensitivity
Level
No
Does the problem still occur?
Change Function Parameter
#023: Increase Training
Check Period
No
Does the problem still occur?
Change Function Parameter
#013: Increase G3 Rx
Equalization
No
Does the problem still occur?
START
No
Yes
Yes
Yes
Yes
END
1. Replace the SC PCB.
Does the problem still occur?
Yes
Check the telephone line
condition.
Refer to Sect. 4.6.
73
No
END