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Power on/off GSD 20

Old 04-28-2003, 12:51 PM
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Default Power on/off GSD 20

For those of you running the GSD 20 with 2006/2010, can you turn the sonar function off or is it always on when the GPS is on? I am interested in having the sonar as backup to Furuno 600 or 582 and of course do not want to run both sounders at same time.
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Old 04-28-2003, 02:21 PM
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Default Power on/off GSD 20

When the 2006/2010 is turned on, the gsd20 automatically goes on. The only way to get around the problem is to put in a separate switch that would turn the +12 volts (red lead) to the gsd20 ON or OFF. You may wish to test it out first by just disconnecting the +12 volts to the gsd20 with the 2006/2010 on and note that the sonar signal disappears and you will get a message that the tells you "Sonar signal Lost" on the 2006/2010.
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Old 04-28-2003, 02:28 PM
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Default Power on/off GSD 20

I have a similar situation. The GSD 20 is a backup to my FURUNO NAVNET sonar.

In some situations they interfere with each other if they are running on the same frequency. The FURUNO allows you to turn off the sonar. But I don't want to lose the superrior FF features of the FURUNO.

The orange wire in the Garmin harness is for remote off/on. I wired a switch in line with this circuit. When I turn the switch off, the GSD 20 shuts down and you see a mesaage "SONAR NOT ON" on the display. Turn the switch on and sonar comes back in seconds. No reboot of the Garmin is needed.

The voltage and amperage in this circuit is minimal, so a mini switch will work. Just make it as moisture proof and protected as you can.

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Old 04-28-2003, 02:37 PM
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Default Power on/off GSD 20

Good deal. Thanks for the help.
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Old 04-28-2003, 02:40 PM
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Default Power on/off GSD 20

Big E, I agree that will work too and a better way. I couldn't remember the color of the wire. By switching the orange wire off, that is equivalent to switching the 12 volts off.
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Old 04-28-2003, 02:49 PM
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Default Power on/off GSD 20

Gil-

I only watched this once or twice, so I may be fuzzy...when you do a cold start of the Garmin (at least mine), it takes about 20 seconds to acquire satellites and about 40 seconds for the sonar to start reading bottom. Now this is where I might be wrong, but, I think using the orange circuit, leaves the GSD 20 in "standby" without transmitting/reciving sonar. Using the red "hot" wire would shut it off and take longer to start up when needed.

I will try that theory next time on the boat since my wires are pretty accessible.

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Old 04-28-2003, 03:35 PM
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Default Power on/off GSD 20

I have never really compared the start times of the 2006 with the reception of the gsd20 sonar signals. Your 20 seconds for the 2006 to acquire and lock on to Sats seems about right. When I hit PAGE after the Sat acquisition phase, the Sonar display comes up and it is chugging away showing about 20% of the right-to-left presentation. I have no idea how that correlates to actual sonar start time.

The orange lead of the 2006 sends the START signal to both the gsd20 and g??17 Gps antenna units, probably by turning on the +12 volts to both units via internal relays. When you turn off the 2006, the START signal is removed from the orange lead and the 17 and 20 shut down, probably by turning off the +12 volts to those units.

I know that if you are going to use the gsd20 with the 182C, Garmin specifies that you must make provision to switch the +12 volt supply to the gsd20 or it will remain on even if you shut down the 182C. The 182c does not have the orange lead output.
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Old 04-29-2003, 05:04 AM
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Default Power on/off GSD 20

I am not in front of my 2006 now but you are saying put a switch in the orange lead. Wouldn't that cut power to the gps17 beacon also? Or is there an orange lead to the gsd 20?
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Old 04-29-2003, 07:19 AM
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Default Power on/off GSD 20

Put the switch in the orange line that feeds the gsd20 only. Leave the gps17 permenantly hooked up to the 2006c orange.
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Old 04-29-2003, 07:51 AM
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Default Power on/off GSD 20

Thanks
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