What to do if there is no RS232 communication with an external device on Sonance Stereo System?
- FFelicia ShepherdSep 23, 2025
If you are experiencing no RS232 communication with an external device on your Sonance stereo system, ensure the external device is turned on and connected with a DB9 Null cable (the DAB1 RS232 Port is configured as ‘Null’, so check the configuration of the external device port). Verify that the external device is properly configured to send/receive, that the ASCII text commands in Program Manager are correct, and that the baud rate and format are properly configured.






