DX-600, DX-800 - Panasonic Fax Service Manual (repair manual). Page 127

127

     

DX-600/800

APR 2002

Edition 1.0

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.

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?

#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

12000 to 2400 bps

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

Perform a communication test after changing settings.

#014 : 0 dBm

4, 8, 12 dBm

#013 : 0 dBm

4, 8, 12 dBm

#032 : 33600 bps

31200 to 2400 bps

#023 : Normal

Long

#032 : 33600 bps

31200 to 2400 bps

#024 : 2100 Hz