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-   -   Wanted- Otto, Dead or Alive (http://www.sailnet.com/forums/general-discussion-sailing-related/98520-wanted-otto-dead-alive.html)

BubbleheadMd 04-15-2013 10:14 AM

Wanted- Otto, Dead or Alive
 
Folks,

I'm on a pretty tight budget, but my old Autohelm 1000 is psychotic. It shuts down after being powered on for an extended period of time, and will not power up again, unless power is cut for several minutes.

If any of you have an old Autohelm 800 or 1000 that you'd like to get rid of, please PM me. Broken motor or belt is ok, just looking for circuit boards to transplant to make one good unit.

I'm referring to the old tiller pilots, not the newer ST 1000/2000 models.

Many thanks.

ctl411 04-15-2013 10:56 AM

Re: Wanted- Otto, Dead or Alive
 
I have one to sell $325. Pm if interested.

jimgo 04-15-2013 02:12 PM

Re: Wanted- Otto, Dead or Alive
 
Any idea what's shutting it down? I'm not familiar with them - what kind of power source do they have?

Barquito 04-15-2013 02:57 PM

Re: Wanted- Otto, Dead or Alive
 
Otto going psycho... is there one of these in there?

http://i45.photobucket.com/albums/f9...cktorrance.jpg

jimgo 04-15-2013 03:31 PM

Re: Wanted- Otto, Dead or Alive
 
I was envisioning something like this:
http://jasonpauljones.files.wordpres...otto-pilot.jpg

or like this:

AUTO - Wickedpedia

BubbleheadMd 04-15-2013 03:48 PM

Re: Wanted- Otto, Dead or Alive
 
Quote:

Originally Posted by jimgo (Post 1016815)
Any idea what's shutting it down? I'm not familiar with them - what kind of power source do they have?

It's just a box with a ram powered by a motor, and a simple control board and a fluxgate compass. All powered by 12v DC.

I imagine that it's something like a failing capacitor, but without more expensive test equipment, it would be difficult to isolate. I don't have logic testers for the chips, and I can't go de-soldering every component from the board to test with a multi-meter.

jimgo 04-15-2013 03:53 PM

Re: Wanted- Otto, Dead or Alive
 
Ahhhh...I've seen pictures, but never paid too much attention to them. I wasn't sure if they were battery powered, in which case I was wondering if there was a rechargable battery in there that might be dying. If you don't go for the one offered above, I'd look for bad solder joints in/near the power supply. Does the unit get hot when it's under power? I'm just wondering if it's something temperature related.

ctl411 04-15-2013 06:35 PM

Re: Wanted- Otto, Dead or Alive
 
Just looked at mine it's not a st1000 it's a simrad tp10 I also have a navico tp32.

hellosailor 04-15-2013 08:10 PM

Re: Wanted- Otto, Dead or Alive
 
Bubblehead, it sounds like an overheat problem. Maybe from thermal expansion across a bad circuit trace (hairline crack) or if there's a thermal breaker of some sort on the board, either preventing a fire or simply aged and worn out. Possibly an overload from a corroded connection that's drawing too much power?

Worth a very close eyeball with a magnifier, to see if there's a simple gross problem in there.

jimrafford 04-16-2013 09:04 AM

Re: Wanted- Otto, Dead or Alive
 
You might try contacting Dan Gerhaurdt. c250@mydurango.net. He fixed mine.
Jim


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