Humminbird Side Imaging Forums

Side Imaging Forums => 797c SI => Topic started by: chetmaychua on September 23, 2015, 01:47:46 AM

Title: unit doesn't work properly after about 95 ft
Post by: chetmaychua on September 23, 2015, 01:47:46 AM

Hi all,
My unit is 797C2 SI combo, firmware 5.450
I recently took the boat to the ocean. Everything worked fine until about 95FT. The unit shown depth reading at 1ft and nothing else was working properly. When I took the boat back to around 80 ft and the unit started working normal again.
Troubleshooting:
Contacted tech support while having trouble in the ocean, they walked me through all the settings and didn't resolve.
Replaced the power cable with a brand new one, bought a new battery just dedicated for the unit. Power is out of the question.
Upgraded firmware to 5.450 latest.
What else should I replace? I am thinking about buying a new transducer.
Any suggestion is appreciated.
Thanks
CMC

Title: Re: unit doesn't work properly after about 95 ft
Post by: ITGEEK on September 23, 2015, 09:38:40 AM

These units are not designed for the ocean (even though they state they'll go very deep).
They are mainly used for shallow water Bass fishing.
They're have been a few complaints when trying to use Humminbird's in deep water.
If you want something proven for the ocean, maybe look at a Furuno.
The new models (Onix), may be capable of using in deep water.

Title: Re: unit doesn't work properly after about 95 ft
Post by: Landry on September 23, 2015, 07:03:25 PM

It should still read waaaaaay past 80' though. Cmon. Ther is something wrong. Return it.

Title: Re: unit doesn't work properly after about 95 ft
Post by: bobcoy on September 23, 2015, 07:14:09 PM

Landry that is an old unit. Not sure it would be worth repairing. He needs to borrow somebody's spare transducer before he pays for a reworked unit. Bob

Title: Re: unit doesn't work properly after about 95 ft
Post by: chetmaychua on September 24, 2015, 12:23:15 AM

Thanks for your feedback.
I decided to buy a new transducer. I will try it this Sunday and let you know.
Humminbird XNT 9 SI 180 T Transom Mount Transducer

Could you confirm that this unit is a 'dualbeam"?
Thanks,
CMC

Title: Re: unit doesn't work properly after about 95 ft
Post by: bobcoy on September 24, 2015, 08:03:07 AM

yes,duel beam

Title: Re: unit doesn't work properly after about 95 ft
Post by: rnvinc on September 24, 2015, 12:08:27 PM

"Dual Beam" is defined as a HB unit capable of transmitting 2 separate frequencies for the 2d sonar function ...

Like Bob mentions ...your 797 is capable of "Dual Beam" ...
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As a sidenote ... "Dual Beam Plus" is defined as a HB unit capable of 2 separate frequencies for the 2d sonar function ... AND the capability to display those 2 frequencies separately or combined in 1 split sonar view or blended into one sonar view ... 

Rickie