Navico DL 200

[Dellbouy]

Neither of my transducers (main & spare)are working. Does anyone know if these can be repaired or checked out ? Have tried spinning the paddle wheels with multimeter across cables but both dead. Are they us? Anybody recommend a decent replacement.
Thanks

 

[starboard]

Picked up a second hand Navico 200 from "HARDLEY" on the forum a few months back. He was changing his system maybe he still has the transducer from the DL200 he could let you have.

Paul.

 

[William_H]

Paddles frequently have a magnetic reed switch in them which is activated by a magnet. This type can be tested by puting a multimeter across the 2 leads on ohms range. turn the paddle slowly to find that contact is made then broken as the paddle magnet passes the switch. You can also test that you should have some small voltage on the wirews out of the main head.
The other kind use a hall effect transistor usually indicated by finding 3 wires from the head to the paddle. There should be about +5 volts continuous on one wire out of the head and about 2.5 volts on the other wire this 2.5 volts comes from the paddle transistor (only when the 5volts go in to the paddle unit) and varies by about .1volt as the magnet passes it. ie 2.6 to 2.4 volts the third wire is a negative return.
So testing with a multimeter is not simple however this may help. My experience is that paddles give a lot of trouble but can be repaired by ripping apart replacing coroded components and resealing. For about 15 years I had an old Smiths log and replaced the reed switch many times before converting to the Hall effect device which again I replaced many times till finally go for GPS for speed. olewill

 

[Cloven]

Replacements are available from A W Marine Gosport. Website is www.awmarine.com

Not cheap however.

 

[Dellbouy]

Many thanks for your help guys. Isn't it amazing where the help comes from on this site?

 

[lancsjohn]

does anybody know wiring for DL200 display to paddle wheel etc.