Autohelm ST4000 Plus problems - Page 4 - SailNet Community
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post #31 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

I do not have that gear. If your gear spins on the new motor shaft, use a chissel to tap some burrs on the shaft and that will make it hold.
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post #32 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

Bummer. Thanks for checking.
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post #33 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

Hello All:
I am new to posting and am excited to see that other owners have similar issues.
I just purchased my first boat, an Ontario 32 in September. I love the boat but there are a few electrical issues I will have to address. The Autohelm has power to the control unit but nothing engages at the wheel.
Does this sound like a simple cable issue? In truth I have dug very deep into the problem, just thought I'd through it out there.
It to is an Autohelm 4000

Thanks in advance
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post #34 of 48 Old 12-04-2012
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Re: Autohelm ST4000 Plus problems

Quote:
Originally Posted by barefoot View Post
Hello All:
I am new to posting and am excited to see that other owners have similar issues.
I just purchased my first boat, an Ontario 32 in September. I love the boat but there are a few electrical issues I will have to address. The Autohelm has power to the control unit but nothing engages at the wheel.
Does this sound like a simple cable issue? In truth I have dug very deep into the problem, just thought I'd through it out there.
It to is an Autohelm 4000

Thanks in advance
Hi, 90% of all electronics problems are cabling and connection. There is a wire from the control unit to the drive motor. First check all connections. It is quite easy to accidentally nudge the connector to the motor, and the connector or the wire can break inside. You can disassemble (quite hard) the connector by pushing the two pins on its side and pulling apart. Disconnect the cable from the drive and use a voltmeter to check the voltage while pressing the 1 or 10 keys (or just after switching on, it drives the motor for 3 secs for even drive belt wear). You will probably see only 2-3 volts indicated, as the driver uses pulses, so don't expect 12V to show up there. If you get voltage there, you can check the motor, by directly applying 12V there. If you get 0V at the cable end, is not good. Check the output on the back of the instrument, the same way. If you still get 0 there, it's instrument problem. Otherwise cable.
The cable as available ready made, but you can fabricate one, it uses Conxall/Switchcraft micro-con-x type connector on the motor end.
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post #35 of 48 Old 12-04-2012
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Re: Autohelm ST4000 Plus problems

The maintenance manual available on the web has a circuit diagram for the control head. The output circuit appears to be a H-Bridge as described at http://modularcircuits.tantosonline....es-the-basics/ . FYI, for anyone attempting to fix a broken control head.
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post #36 of 48 Old 01-07-2013
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Re: Autohelm ST4000 Plus problems

Hi, I am new to this forum & can't figure out how to post a new question.

I have searched through the various forums, but can't find this problem mentioned anywhere.

My ST4000+ display seems to have become very dim. If I look very carefully, I can just see the heading in certain light conditions, but it's almost impossible to make anything else out on the screen.

I am not sure if this is a LCD or a backlight issue, or something else. Raymarine have been impossible to contact for help (as always).

I hope someone can help.
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post #37 of 48 Old 01-07-2013
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Re: Autohelm ST4000 Plus problems

This may not apply to your 4000+ or its firmware version, but some Raymarine instrument heads have adjustable contrast:


To set the contrast level for the ST7001 display:
1. With the autopilot in Standby mode, press the disp key for one second to
access the LAMP screen.
2. Press the disp key for one second again, to display the CONTRAST screen.
3. Use the up and down arrow keys to set the required contrast level (from
1 to 15). >/quote>

Norman
s/y "Redline"
1998 Jeanneau SO45.2
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post #38 of 48 Old 01-07-2013
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Re: Autohelm ST4000 Plus problems

It doesn't sound like a back lighting problem. I have my ST4000+ control head taken apart. The LCD is easily readable without back lighting.
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post #39 of 48 Old 01-07-2013
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Re: Autohelm ST4000 Plus problems

Agreed, I think it must be a problem with the LCD, so I will take it apart and have a look
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post #40 of 48 Old 01-08-2013
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Re: Autohelm ST4000 Plus problems

It's definitely not backlight problem, as the LCD should be visible in natural light, without backligth.
The ST4000+ is fairly easily taken apart. The LCD is held in place by a plastic bracket, secured by screws. Take it off, and carefully clean the contacts on the circuit board. If you are real careful, you can also clean the contacts on the LCD itself (they are invisible!) and the rubber conductor that is between the LCD and the board. Don't use WD40 or like, use alcohol!
This can help. However, if the LCD is uniformly dim, then probably there are other problems, as the above contact problems usually result in some of the segments6pixels being dim.
BTW, at the Raymarine Technical Forum Raymarine Technical Forum they seem to be very helpful and responsive, try that.
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