Question about Raymarine St40 Depth Display E22038

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ST40 Depth and Knot meter

The display is blank, yet I'm almost positive there is power. I have disconnected another power line that I know works, to the ST40, and still nothing

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  • paulschocker Feb 25, 2009

    Same problem, checked for power and also the line to the base of the mast "did not get to the top yet" I get a blank screen. Is there a way to reset? Thanks Paul Schocker

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90% the problem is a little elektronik part if you know some body who is good in elektronik he will find it fast,
the part cost afew cent

Posted on Nov 03, 2009

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I traced the line from the mast and it was good so finally ordered a new instrument head "$150", It works now, the head was 2 years old {the length of the warranty} not a very long lasting instrument, hope I get more time out of the new one.

Posted on Mar 14, 2009

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Need a repair shop for GPS,Fisher


Hi Clarence
Although the problem COULD be a faulty depth transducer, in my experience this is usually caused by a cabling problem, either there is a poor connection at the display unit, a poor power cable connection, RF interference from another device or the cable has been pinched causing an intermittent fault. After making SURE the power cable is tight, I'd clean the connections, then inspect the cable looking for an area that has been stressed. If you have a VHF radio nearby, try shutting that down during your testing. If depth reads normally, you know where your issue lies.

Good Luck!
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Raymarine ST40 Bidata Manual


Hi

I realize this question has gone unanswered for quite awhile, but here is the link to ST40 owners manuals.

-Steve



https://flir.app.box.com/s/w7dp1h5hwi1f3fmda4x1/1/402191597

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2 Answers

Just purchased and Eagle Fishmark 320 used. Will not display depth reading - just shows 0'0"? I have reset to factory settings. We have had in lake,same thing. Right now in 5 gallon bucket of...


Hello! Do you have the PDF users guide for your unit? I'm looking at a copy in the troubleshooting section...I don't want to cover information you have already looked at or tried...Since I do not know if you have that manual I'll give you a few items to check...

Measure the battery at the units power connector...Must be at least 11 volts DC...In portable mode it uses 8 D cell batteries= 12 volts
Make certain the Transducer is securely connected...
Did you use the in-line fuse supplied with the unit?...
Try the Manual Depth Range...First turn off Auto Depth Range...From the sonar Page Hit MENU...Down-arrow to Auto Depth Range...Hit ENT...Hit Up-Arrow to Depth Range...Hit ENT..
And the Depth Scale Range appears...Up-Arrow or Down-Arrow to select a different depth range...Hit Exit...The minimum depth the unit can read is 5 feet...

If you do not have the PDF guide, here is the link...

http://www.eaglenav.com/upload/Eagle/Documents/Manuals/seafinder320df_0143-661_101602.pdf


Let me know how you make out....Guru....Saailer

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Hello, our Raymarine ST40 depth sounder on our trailer sailer has stopped working only shows 0.00 depth on the display screen. However the metres symbol now flashes on/off. I have checked the cable...


now there is a chance that the transducer is bad ,, but I would check the battery voltage and make sure you have a soild 12 volts to the unit. also in my many years of working with and installing these units on boats I have see the needle pins ( where the plug inserts in the back of the display unit ) bend and/or break off completely. look in the plug area of the display unit and make sure all pins are intact. one more place to look for the problem is in the plug itself, take the plug apart and inspect the wire connection and make sure they are all good. if after all the above has been checked then I would assume that it is the transducer itself.
if you have anymore questions with this problem, please feel free to write back and ask,

c...

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1 Answer

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Check the battery power at the unit with a DC volt meter, and also use the meter's AC setting across the power post on unit. If AC volts are above a tenth of a volt, the wires to battery may be to small, not allowing enough current to drive the transducer and electronics in unit.

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Jul 24, 2008 | Raymarine St40 Depth Display E22038

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