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Author Topic:   Dead or Malfunctioning SONAR Transducer
kwik_wurk posted 05-27-2009 11:41 AM ET (US)   Profile for kwik_wurk   Send Email to kwik_wurk  
How does a dead or damaged sonar transducer behave? One of mine is giving erroneous depths. I have swapped head units, restored to factory defaults, and checked for nicked cables. No luck.

I assume the when the crystal gets cracked, the head unit doesn't know good the difference, aside from short and open circuits.

Jefecinco posted 05-27-2009 06:56 PM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
You could try a hard boot. From there I'd contact customer service.


jimh posted 05-27-2009 08:21 PM ET (US)     Profile for jimh  Send Email to jimh     
Try your control head with someone else's transducer. This should isolate the trouble to either the transducer or the control head.
kwik_wurk posted 05-29-2009 02:57 PM ET (US)     Profile for kwik_wurk  Send Email to kwik_wurk     
Well after more testing and calls to customer technical support the transducer is identified as dead.

It is likely that it took a strike and cracked the crystal.

But here is the basic nature of the problems:

-the measured depth was always deep (both 50 & 200 kHz); both an offset (~10 ft) and scalar multiplier were observed.

-the 50 kHz frequency did not have any useful response

-the bottom (or whiteline) would not perform at all with 50 kHz.

-the remaining features (identifying suspended objects/fish) still worked fine, but marked at improper depths, and sometimes under represented

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