Panasonic UF-490 Service Manual page 76

4.3.7. Information Codes: 459, 494, 495
Check the line connection
between the telephone jack on
the wall and the SC PCB.
Is communication with the
reference unit successful?
Does the trouble occur
regardless of the remote unit?
If the telephone line frequently
disconnects at the beginning of
each communication, ask the
telephone company to check
the line.
START
No
Yes
Check the telephone line
condition.
No
Yes
END
1. Replace the SC PCB.
Does the problem still occur?
Yes
1. Check the remote unit in
question.
(Remote unit is defective)
2. Refer to Sect. 4.6.
76
No
END