[amsat-bb] Yaesu G-5500 Control Box Problem

[Norm n3ykf]

The tracker reads voltages produced inside the controller that are
identical to those seen at the input terminals on the back of the
control box. I.E. pot voltages from the rotators.

If the tracker works but the meters do not, the opamps that drive the
meters have trouble. Since it's both, I suspect that the opamps are on
one chip. Either the chip is bad or a rail (+v or gnd) is open.

My g5400 control box blew fuses when unconnected to rotators. Removed
the covers to do gross level troubleshooting. Boards are stacked and
wired together with harnesses. Splitting the unit to repair is not my
idea of fun. Tag the wires. Splice in test jumpers..... Here be
dragons.

Norm n3ykf


On Sun, Dec 4, 2016 at 6:20 PM, Rafael Pena <pinoleronica at hotmail.com> wrote:
> No, none.
>
> The rotor works while using SatPC32 and the LVB tracker…maybe I used it for more than 5 minutes per the doc?
>
> From: Stefan Wagener [mailto:wageners at gmail.com]
> Sent: Sunday, December 04, 2016 5:49 PM
> To: Rafael Pena <pinoleronica at hotmail.com>
> Cc: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Yaesu G-5500 Control Box Problem
>
> Any loose cables in the back of the control box?
>
> Stefan
>
> On Sun, Dec 4, 2016 at 4:46 PM, Rafael Pena <pinoleronica at hotmail.com<mailto:pinoleronica at hotmail.com>> wrote:
> ...and suddently, the analogue display of the Yaesu G-5500 (Elev / Azim)...I mean the needles stopped moving.   Neither the Elevation nor the Azimuth needles are moving at all but the rotor is working when tracking with SatPC32 / LVB.
>
> Any hints on repairs are / will be appreciated.
>
> Who repairs this control boxes?
>
> Thanks
>
> Rafael / NN3RP
>
>
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