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Simrad go9 with total scan problem

Old 08-20-2017, 06:48 PM
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Default Simrad go9 with total scan problem

I have a totalscan transducer. It worked fine for about a week. Then on sonar and totalscan it starting make a screen like the pic below. All is installed correct and nothing has moved and nothing is on transducer. This is a picture sitting still in 4ft of water. What in the world is going on. It's brand new. And again it worked fine the first few times.
Old 08-21-2017, 06:08 PM
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Did you try any of the other frequencies?
Old 08-21-2017, 06:33 PM
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Originally Posted by H2OBUG View Post
Did you try any of the other frequencies?
Yeah tried them all. So frustrated.
Old 08-21-2017, 09:39 PM
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Whoa!. Never seen a F/F which appeared to have a T/D in the water but was also reading -2' (above the surface.) I wonder if it would show jumping catfish?

Did you try re-adjusting gain waaay down and slowly bring it back up until (&if) things look normal?
Perhaps in very shallow water like that , also reduce ping speed and raise TVG?

Does it look like that in deep water where the sonar beams might not keep bouncing between bottom and boat bottom & surface?
Old 08-21-2017, 10:48 PM
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Originally Posted by TTaxi View Post
Whoa!. Never seen a F/F which appeared to have a T/D in the water but was also reading -2' (above the surface.) I wonder if it would show jumping catfish?

Did you try re-adjusting gain waaay down and slowly bring it back up until (&if) things look normal?
Perhaps in very shallow water like that , also reduce ping speed and raise TVG?

Does it look like that in deep water where the sonar beams might not keep bouncing between bottom and boat bottom & surface?
Lol. It is crazy. I have not tried those things but I will. It doesn't look that bad in deep water but still looks bad. What is TVG? Thanks so much.
Old 08-22-2017, 03:30 AM
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I had that problem when mine was first installed it ended up being a faulty ducer, they sent out a new one and all was well
Old 08-22-2017, 05:10 AM
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It looks like a bad transducer or poor connection.
Old 08-22-2017, 05:24 AM
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Originally Posted by offracing View Post
I had that problem when mine was first installed it ended up being a faulty ducer, they sent out a new one and all was well
How did you go about getting a new one sent to you? Thanks.
Old 08-22-2017, 05:54 AM
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Originally Posted by mikeschops View Post
How did you go about getting a new one sent to you? Thanks.
The dealer ordered and did the install, they called navico first to try and troubleshoot it, when found to be faulty the dealer called the supplier they purchased it from and they swapped out the old for the new
Old 08-22-2017, 07:06 AM
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I would agree with the transducer is not working properly. I would call Simrad and see if they can get it switched out for you.
Old 08-22-2017, 07:38 AM
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This don't look like a transducer issue. The sounder is reporting negative depth, I suspect it's related to transducer mounting offset.

Try a HW reset (this will erase all waypoints, so store them on a micro SD card first)

Start with unit off, push and hold the power button 4-5 seconds until the unit beeps.
Old 08-22-2017, 01:19 PM
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Originally Posted by mikeschops View Post
Lol. It is crazy. I have not tried those things but I will. It doesn't look that bad in deep water but still looks bad. What is TVG? Thanks so much.

I believe it stands for Time Variable Gain, and its effect is essentially to filter out unwanted return clutter near the surface on the display.

Abbor's good suggestion of trying the master(?) reset may well have a good chance of knocking some sonar sense back into this GO9. Hope it works!
Old 08-22-2017, 01:55 PM
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Originally Posted by abbor View Post
This don't look like a transducer issue. The sounder is reporting negative depth, I suspect it's related to transducer mounting offset.

Try a HW reset (this will erase all waypoints, so store them on a micro SD card first)

Start with unit off, push and hold the power button 4-5 seconds until the unit beeps.
Ok I'll try this first. Thanks.

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