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To connect your Garmin 741sx with your Raymarine ST 4000 using NMEA 183, you will need an NMEA 0183 interface cable to connect the two devices. Here are the steps to follow:
Obtain an NMEA 0183 interface cable that has the correct connectors for your Garmin 741sx and Raymarine ST 4000.
Connect one end of the NMEA 0183 interface cable to the NMEA output of your Garmin 741sx.
Connect the other end of the NMEA 0183 interface cable to the NMEA input of your Raymarine ST 4000.
Configure your Garmin 741sx to output NMEA 0183 data. Refer to your Garmin 741sx manual for instructions on how to configure NMEA output.
Configure your Raymarine ST 4000 to receive NMEA 0183 data. Refer to your Raymarine ST 4000 manual for instructions on how to configure NMEA input.
Once both devices are configured, the data from the Garmin 741sx should be transmitted to the Raymarine ST 4000 via the NMEA 0183 interface cable.
Switch input connection pairs and if the 'fault' doesn't changes from one channel to the other it is almost certainly an amplifier or output fault.
Likewise switching the speakers. If after swapping the speaker connections the fault changes to the other speaker it is an amplifier fault. If not a speaker fault.
it might take some time being a freeware driver solution
Note: it will find all of your outdated drivers
This will automatically search for and find the correct driver you will have to
update every driver individually once you update you might be asked whether you
want to restart or make a system restore point.
Click no to both of these then continue updating each driver free then restart
once all of the drivers have been updated.
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