GPS receivers connectors  > Lowrance pinouts
Signal and audio for the iFinder PhD, H2O, Hunt, and other units.
bottom of the unit Pin Pin
1 ext. power 3.3v externally regulated. DO NOT FEED WITH 12 VOLTS!
2 serial in RS232 data, connect straight to PC com port
3 serial out RS232 data, connect straight to PC com port
4 ground signal ground
5 headphone select ground this pin to disable internal beeper and send audio out connector instead
6 left audio for the firmwares mp3/ogg player, of course
7 right audio and the waypoint voicenote feature, too

The PC-DI7 cable uses four pins, but doesnt bring out the audio connections for simultaneous use as an audio player.

7 pin unspecified connector layout
7 pin unspecified connector
at the bottom of the unit
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Lowrance iFinder cable visual pinout:
Lowrance iFinder cable diagram
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