This unit was working perfectly until last night. Last night the depth started jumping around. I was in 4 ow and it would jump back and forth to 60+ feet with a poor reading. What caused this???
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This unit was working perfectly until last night. Last night the depth started jumping around. I was in 4 ow and it would jump back and forth to 60+ feet with a poor reading. What caused this???
Hope you can get an answer I just bought one this spring and mine started doing the same thing last week
One thing I know for sure is to make sure you have the latest update (6.090) You may want to reset all to default and reset your settings.
make sure the TD is fairly clean, read where dirt/pollen/etc on the TD could affect readings. Also check your battery connections.
I also read RF Interference? I know I have some but it is very sporadic so hard to isolated. I’m grounding the batteries this weekend. Hope it helps. I will check for mud and clean the TD since I was in shallow water.
Why does the latest update matter? If it was working fine and I’m happy why would I ever need to update it? Just wondering. Thanks
Some of the updates include fixes to the extact depth problem you are having...something to do with changes in how the unit processes the information it receives from the transducer. I felt the same as you but sometimes it's to your advantage to update even if you see no obvious reason to do so.Quote:
Originally Posted by keeferfish
I have the latest update and reset everything back to factory settings and it still does it. It is connected to the starting battery. I worked great for the first 3 weeks then just started to happen last weekQuote:
Originally Posted by KDAVID1
I would say there is some interference or something then but really can't say for sure. i would check and make sure your don't have any corrosion and all of your connections are good. Make sure you have a good battery--ie: the easy things first. If all of that pans out and still the same--I would give HB customer service a call. You may have to wait for a bit on hold but it is well worth it--they can help alot.Quote:
Originally Posted by RBeav
The latest update fixed my 788 DI depth issues. I am still getting interference from the TM though. The interference doesn't effect depth, just messes up the display.
Some areas of the country are having bigger than normal pollen blooms...
I have read of erratic depth readings attributed to these pollen blooms...
Just a thought...
Rickie
So now me and my graph have hayfever? :Doh:
Seems like I remember this problem with mine.. Try going to user mode and set it on advanced and in the sonar menu there will be a setting for salt and fresh water..try setting it on salt (shallow) and see what happens. Good luck
After checking the power connections do some basic depth reading troubleshooting:
1. Make sure all other electronic devices are turned off. This includes bilge pumps, other sonar units and even the main and trolling/kicker motors. This eliminates any form of interference and also lets us know if it works correctly while drifting (so the issue is or is not related to air bubbles flowing across the transducer).
2. See if you can tie the depth reading problem to a certain water depth or unit frequency setting. In fact it is best to go ahead and reset the menus back to the factory settings to test it.
3. Test your unit on another boat that uses a similar transducer. Many of our units use the same 2D sonar and so finding another Humminbird user to test your unit on their boat is easier to do. Remember though: the DI model units have to be tested on transducers from other DI units.