Communications - Panasonic UF-6300 Service Manual

4.6.

Communications

This section explains general troubleshooting procedures for the 400 series of Information Codes. These
errors are primarily caused by poor telephone line quality (loss, noise, echo, etc.). This unit is furnished with
Service Mode 1 to assist in troubleshooting line quality problems.
It is suggested that both the transmitting unit and receiving unit be adjusted. This section gives relevant
parameters in Service Mode 1 for the transmitting and receiving sides. If no improvement is realized after
the parameters are adjusted, it is recommended that the parameters be returned to the default settings.
4.6.1. Communication Trouble
START
Is this an international
communication?
No
To equalize loss (Amplitude Distortion) between the fax unit,
and the phone company exchange.
Transmitting Side
#014 : 0 dBm 4, 8, 12 dBm
To improve a poor S/N (signal-to-noise ratio).
Transmitting Side
#010 : -9 dBm 0 to -15 dBm
#017 : 14400 bps 12000 to 2400 bps
#033 : 33600 bps 31200 to 2400 bps
To cope with impulse noise.
Receiving Side
#070 : 128 256 to 2048
To cope with shifted signal sequences caused by an echo.
Transmitting Side
#025 : 1st 2nd
Perform a communication test after changing settings.
Yes
Transmitting Side
#021 : Off On
#025 : 1st 2nd
Receiving Side
#013 : 0 dBm 4, 8, 12 dBm
#011 : -43 dBm
#018 : 14400 bps
#019 : On
#023 : Normal
#033 : 33600 bps
Receiving Side
#024 : 2100 Hz 1080 Hz
#030 : 75 ms 1 sec
#018 : 14400 bps
#024 : 2100 Hz
#030 : 75 ms
#033 : 33600 bps
Receiving Side
-33 dBm or -38 dBm
12000 to 2400 bps
Off
Long
31200 to 2400 bps
113
Receiving Side
12000 to 2400 bps
1080 Hz
1 sec
31200 to 2400 bps/
TC9600/TC7200