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[TG11] st4000+ control unit voltage

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[TG11] st4000+ control unit voltage
01-06-19, 09:52 PM (This post was last modified: 01-07-19 01:35 PM by Chuck - Raymarine - Moderator.)
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[TG11] st4000+ control unit voltage
I have a st4000+ that wont operate the motor drive due to low voltage.

To bypass any possible wiring, battery or voltage drop problems I looked at the rear of the control unit and tested directly with a multimeter. A multimeter check of the control unit shows 12+ volts into it (the "12v" terminals) from the battery OK. When I engage the autopilot the "drive" terminals only show an output of 5 volts briefly then falling quickly to less than 1 volt.

When I bypass the control unit and feed 12v directly into the motor it works fine and can turn the wheel.

any thoughts would be appreciated.
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[TG11] st4000+ control unit voltage - timpa - 01-06-19 09:52 PM

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