Panasonic DP-180, Service Manual

Page: 109 / 375

109
UF-9000
APR 2006
Ver. 3.0
DP-180/190
4.5. 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.
4.5.1. Communication Trouble
START
No
Yes Is this an international
#021 : Off On
#025 : 1st 2nd
#018 : 14400 bps 12000 to 2400 bps
#024 : 2100 Hz 1080 Hz
#030 : 75 ms
#033 : 33600 bps 31200 to 2400 bps/
TC9600/TC7200
1 sec
communication?
Transmitting Side Receiving Side
#010 : -9 dBm 0 to -15 dBm
To improve a poor S/N (signal-to-noise ratio).
#017 : 14400 bps 12000 to 2400 bps
#011 : -43 dBm -33 dBm or -38 dBm
#018 : 14400 bps
#019 : On Off
12000 to 2400 bps
Transmitting Side Receiving Side
Receiving Side
To equalize loss (Amplitude Distortion) between the fax unit
and the phone company exchange.
#025 : 1st 2nd 1080 Hz
#030 : 75 ms 1 sec
To cope with shifted signal sequences caused by an echo.
#070 : 128 256 to 2048
To cope with impulse noise.
Receiving Side
Perform a communication test after changing settings.
Transmitting Side Receiving Side
Transmitting Side
#014 : 0 dBm 4, 8, 12 dBm #013 : 0 dBm 4, 8, 12 dBm
#033 : 33600 bps 31200 to 2400 bps
#023 : Normal Long
#033 : 33600 bps 31200 to 2400 bps
#024 : 2100 Hz