This unit was new in 2010. I started having this problem the second year and it's only got worse since. This year it resets to 2.2 feet almost immediately.
SOURCE: Lowrance x96 does not function after 20 feet depth
Your transducer needs to be adjusted so the return signal can be picked up. Some of these have to be super tuned to receive the signal. Also the transducer may be moving ever so slightly when the boat is traveling at speed. You may have some water turbulence interference all contibute to signal return.
SOURCE: x510c most of the time it reads 1.6 for the depth,
Does this occur at any depths...over 20ft even.
The X510c will have problems keeping depth in shallow water...especially if it is muddy, weedy down there.
If the problem occurs even in depth over 20ft, then try resetting the unit:
1. Turn unit off
2. Press and hold ZIN, ZOUT, and PWR until you see the depth (flashing or not) in the top left corner.
If the problem still occurs, make sure the transducer is clean and still mounted so that it is sending the signal straight down to the bottom.
If the problem still occurs, make sure the power is good. You can have the voltage displayed on the screen through the overlay data menu.
Does the problem occur at any speed? If the problem clears up when you stop or slow down, the problem is due to cavitation and the transducer will need to be moved to a location where it is in a smooth flow of water at all speeds.
If none of this helps, there may be a malfunction with the X510c. You can try to update it but you will need to get the software update from someone at Lowrance support and then find a way to connect your X510c to a Lowrance unit that has a memory card slot via a NMEA 2000 network. I can help you with this if you need.
Other than that you can have the X510c returned to the factory for service.
SOURCE: i have a lowrance 520c
Hello
If you have changed several settings and wants ot return the unit to basic automatic operation:
* Press "Menu ' Menu ' (down arrow) to System Setup ' End ' (down arrow) to Reset Options ' End.
** Press (
Try these. There is no other adjustments can or should be done to this unit. OK.
SOURCE: shows incorrect depth suddenly and Erratic displays
MY XD510c works fine then flashes 2.5 and fills the screen with black red blue white vertical lines...then after an amount of variable amount of time goes back to working for awhile
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