No depth reading on Raymarine E120

villain style

villain style

Well-Known Member
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Oct 10, 2006
1,710
Safe Harbor Marina Kent Island, MD
Boat Info
2006 44 DA
QSC 8.3s
Engines
Cummins QSC 8.3s 500HO
Last year replaced both Raymarine E120 with used E120s. Néw used Dieselcraft also. Have cleaned all connections behind Dieselcraft to gauges. As far as can tell everything works except depth reading. I have the depth display on Chartplotters but it just says “Depth - -“ on each Chartplotter. Appreciate help.
2006 44 Sundancer QSC 500s.
 
Mark, a couple of thoughts:
- Transducers aren't known for longevity so yours could be bad.
- The standard dual E120 setup for boats of our vintage included a Raymarine NMEA0183/Seatalk multiplexer, primarily to provide depth to both the Smartcraft and Raymarine units at the same time. That multiplexer went bad on me once and caused me to lose depth. Sea Ray system drawing attached.
 

Attachments

  • Raymarine Dual E120.pdf
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Thank you for the attachment and reply. Was your depth the only thing that went out at the time? Did you have a way to test the multiplexor or just replaced it?
 
villain style said:
Thank you for the attachment and reply. Was your depth the only thing that went out at the time? Did you have a way to test the multiplexor or just replaced it?
Click to expand...
An electronics tech at the local dealer found it. It seems to me you could check to see if your Smartcraft is still getting waypoints from your MFD, that data travels through the multiplexer if you have one.
 
C9DA4FD8-EA1E-470F-8733-69308C808AD4.jpeg

I lost a transducer due to a lightning strike that hit our flagpole and back fed power through the water to the boat. None of the fish finding stuff worked. The electronics tech verified that it was the transducer by hanging the electrical line to my display over the side of the boat with a brand new transducer attached to it. The new component worked so we did a quick short haul of the boat and installed the new unit which worked perfectly. Kind of an ingenious way of testing things without spending money unnecessarily.
 
Purely anecdotal add, I also just replaced a failed Raymarine/Airmar transducer that was installed at the same time (2010) as the E120Ws that were replaced last year. Could be the transducer went bad, but my money is on the fact it, and the dedicated VHF antenna for the AIS, were two of the three original parts not replaced in the 2020 electronics upgrade.
 
villain style said:
Thank you for the attachment and reply. Was your depth the only thing that went out at the time? Did you have a way to test the multiplexor or just replaced it?
Click to expand...
Mark
Typically the Raymarine sounders were wired to a DSM250 or DSM300 Sounder Module which is usually under the helm. That Sounder module is connected via SeatalkHS (ethernet) to a Raymarine network switch then from that switch to the E120 displays. The DSM sounder is historically a higher than normal failure item.
The Raymarine navigation system (E120's, Autopilot, Sounder, Radar) usually has no interconnection to the Mercury Smartcraft system nor to the Sea Ray Navigator system (if you had that on the boat). So, provided someone didn't rewire a bunch of stuff, you may be dealing with a couple of issues if you are not getting depth on your Diesel View and you did before nor the Raymarine E120's if you could see the depth there also.
 
ttmott said:
Mark
Typically the Raymarine sounders were wired to a DSM250 or DSM300 Sounder Module which is usually under the helm. That Sounder module is connected via SeatalkHS (ethernet) to a Raymarine network switch then from that switch to the E120 displays. The DSM sounder is historically a higher than normal failure item.
The Raymarine navigation system (E120's, Autopilot, Sounder, Radar) usually has no interconnection to the Mercury Smartcraft system nor to the Sea Ray Navigator system (if you had that on the boat). So, provided someone didn't rewire a bunch of stuff, you may be dealing with a couple of issues if you are not getting depth on your Diesel View and you did before nor the Raymarine E120's if you could see the depth there also.
Click to expand...
This is what you need to check. There were some DSM modules that were faulty and failed. I think it was some bad soldering. There are fault lights on the units so once you find it, you can sort out if it is working or not. The only thing @ttmott did not say specifically, is that the transducer cable runs into the DSM unit, then the DSM connects to the Raymarine E120 head unit (they call it an "MFD")
 
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