[TowerTalk] Troubleshoot G-1000DXA rotor?

[Barry N1EU]

Thanks for all the helpful responses.  It looks like there's a total
disconnect in the cable out to the rotor.  Next step will be to drop
the AB577 and have a look at the rotor end.

73,
Barry N1EU

On Tue, Jul 17, 2012 at 10:20 PM, K0DAN <k0dan at comcast.net> wrote:
> If you disconnect the controller & rotor try sending about 12-18VDC up pins
> 4 & 5 to the motor. It should turn, and if you swap the +/- it should
> reverse directions.
>
> The controller should put 12-18VDC on pins 4 & 5, voltage will vary
> depending on the speed control setting.
>
> You should get approx. 500 ohms measuring across pins 1 & 3 up to the rotor,
> that is the resistor strip which determines azimuth. The sum of (pin
> 1-2)+(pin2-3) should also equal approx. 500 ohms.
>
> Doing these tests should help you at least isolate if it's the motor, and if
> the resistor strip is good.
>
> Yaesu will repair the control boxes (well, they used to anyway) but the
> repair is costly. They do not repair the tower-mounted units. There is a
> reasonable used market for the controllers, and any of the SDX/DXA units can
> be interchanged if you replace the connectors or build a cheater cable to
> modify the connector pinouts.
>
> GL es 73
>
> Dan
> K0DAN
>
>
> -----Original Message----- From: Barry N1EU
> Sent: July 17, 2012 02:50 PM
>
> To: Tower Talk List
> Subject: [TowerTalk] Troubleshoot G-1000DXA rotor?
>
> Without warning, my 1-year old Yaesu G-1000DXA rotor stopped
> functioning.  The control box light is on, but no response to the
> "left" or "right" switches and the rotor itself isn't turning.  By any
> chance, has anybody compiled troubleshooting tips, e.g., using VOM at
> control box or rotor, etc?
>
> Thanks & 73,
> Barry N1EU
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