Panasonic UF-890 Service Manual page 126

4.3.7 Information Codes: 459, 494, 495
Check the line connection
between the telephone jack on
the wall and the LCU 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
No
Yes
END
1. Replace the LCU PCB.
2. Replace the FCB PCB.
Does the problem still occur?
Yes
Check the telephone line condition.
1. Check the remote unit in
question. (Remote unit is defective)
2. Refer to Sect. 4.6.
126
No
END