Panasonic UF-580 Service Manual page 93

4.3.3. Information Codes: 404, 405, 407
Is communication with reference
unit successful?
Change Function Parameter #010:
Reduce Tx Attenuation Level
No
Does the problem still occur?
Change Function Parameter #017:
Reduce Tx Modem Speed
No
Does the problem still occur?
Change Funciotn Parameter #014:
Increase G3 Tx Equalization
No
Does the problem still occur?
Change Function Parameter #025:
Communication Startup to 2nd
Does the problem still occur?
START
Yes
Yes
Yes
Yes
No
END
No
1. Replace the MJR PCB.
2. Replace the SC PCB.
Does the problem still occur?
Check the telephone line condition.
Check the remote unit.
(Recording paper may have run
out or paper may have jammed.)
Does the problem still occur?
Yes
Refer to Sect. 4.6.
93
No
Yes
END
No
Yes