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Raymarine A65 Combo. Sonar has never worked properly since initial install by boat maker. The depth is intermittent when it works at all. Sometimes it works at speed, sometimes at rest. Sometimes in shallow water, sometimes only in deep. We have changed the position of the transducer, even going so far as to send a photo of the transducer placement to the Raymarine representative. He recommended changing the position of the transducer one more time so it would follow the profile of the bottom of the boat (i.e. at about a 20 degree slope off of level, thought this was weird, but it worked for awhile). The only thing that we see wrong is that the plastic lock nut which secures the transducer wire into the bottom of the digital converter box(?) was crushed upon installation. The wire seems secure, but...

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SOURCE: Raymarine A65

When the engine starts, there is a voltage drop as the starters crank, followed by a power surge as the alternators kick in and the voltage comes back up.

Ferrites are only there to prevent RF (Radio Wave) interference from other onboard devices.

You should either:
-add an isolated battery to the boat to service only your electronics. That way it is unaffected by the starters.

-There are several devices on the market like Newmar Power's "Start-Gurad" that automatically switch electronics to backup power during engine start. They work great and the electronics don't skip a beat.

Posted on Dec 28, 2007

  • 1 Answer

SOURCE: A65 Transducer

jmiller,

Sound like your getting turbulence from the hull or your angle is allowing cavitation under the transducer. Look under the hull where the traducer is mounted and look for a part that has no obstruction including saltwater pickups, hull relieves, etc. The other thing to check is to take a strait edge on the bottom of the transducer to ensure the angle is slightly forward than the hull.

Bob

Posted on Dec 27, 2008

  • 111 Answers

SOURCE: raymarine a65 transducer 200kh fine 50kh not reading bottom

Sounds like your transducer either has drifted off frequency (age or been hit) Or your a65 is not able to transmit at that frequency. You should take it to a dealer with a Fish finder simulator and have it checked out before you go through the painstaking grief of a new transducer.

Posted on Jan 22, 2010

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Sonar intermittent very good through hull transducer , sonar works sometimes then will not work rest of day ,


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Raymarine a65 transducer 200kh fine 50kh not reading bottom


First do a factory reset and determine that all the setting are correct. You can get this info from the manual. Remember you will loose any saved way points when you do the reset. If that does not sort you out;Remove transducer from transom mount and duck tape it to a broom stick so that the transducer face is facing down. With the boat standing still in calm water and the ducer hooked to the DSM25 push it below the water and see if it see bottom on 50khz.The idea here is to get the ducer in another location to see that it is not getting reflections of the boat. 50Khz is very prone to reflecting of stuff around it. If you still have a problem I would send the ducer and DSM25 unit back under warrant .No need to send A65 back it should not have a problem.

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Generally, that indicates air bubbles in the water under the transducer. If you have a transom-mount transducer, make sure the bottom surface is level or angled slightly down. If you have a thru-hull, make sure your bottom is fairly clean in that area.

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jmiller,

Sound like your getting turbulence from the hull or your angle is allowing cavitation under the transducer. Look under the hull where the traducer is mounted and look for a part that has no obstruction including saltwater pickups, hull relieves, etc. The other thing to check is to take a strait edge on the bottom of the transducer to ensure the angle is slightly forward than the hull.

Bob

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Remove all wiring from 4000 head, hook up only 12V, if seatalk fail continues, it is the head. if seatalk fail goes away, hook in instruments one by one until the bad head is found. Seatalk is 12V red, Ground Screen(bare wire) and Data yellow (pulsing voltage). good luck 847-746-0100 John Barry

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With the charts page up, start by hitting the find ship softkey at the bottom of the screen.If that find the boat on the chart all is good.If not you need to check you have a GPS fix. Go to GPS screen and see you are seeing satalites.
If all is good when you hit find ship and the boat disappears again from chart while underway you will need to go into the chart setup menu and see if the screen amplifier is turned off. If off turn on.This is first place to start. Hope that helps

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1 Answer

No depth reading while on plane.


Depending on your transducer type, you may have a liquid filled type that simply needs refilling. If this is the case check for leaks and get it redone. If not it could be transducer placement or cavitation under the hull.

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When the engine starts, there is a voltage drop as the starters crank, followed by a power surge as the alternators kick in and the voltage comes back up.

Ferrites are only there to prevent RF (Radio Wave) interference from other onboard devices.

You should either:
-add an isolated battery to the boat to service only your electronics. That way it is unaffected by the starters.

-There are several devices on the market like Newmar Power's "Start-Gurad" that automatically switch electronics to backup power during engine start. They work great and the electronics don't skip a beat.

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1 Answer

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It is unlikely the problem is in the A65 screen.....most likely it is an issue with the paddlewheel itself, its circuit in the depth/speed transducer, or least likely, in the DSM25 sounder module.

Both the log and the trip functiions are read from the paddle-wheel sensor of the connected DSM25 sounder module and transducer.

1. Make sure you have a DSM25 sounder module and transducer with a paddle wheel (the A65 is available without the DSM25 option.)

Double check the connections between the DSM25 and the A65, as well as the transducer connection to the A65. There is an indicator light on the DSM25 to confirm it is on.

2. Make sure the paddle wheel turns freely. They tend to get fouled easily with debris and growth.

3. Make sure the A65 is giving to a reading for SPEED when underway or when having a buddy spin the paddlewheel by hand. Do not confuse SPEED with SOG. SPEED is from the paddlewheel.....SOG (Speed over ground) comes from your GPS sensor and is not used by A65 for log or trip purposes.

If you get npo speed reading at all the paddle wheel may be defective or the depth/speed transducer may be defective. See your dealer about a replacement.

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