Re: [CAD_CAM_EDM_DRO] RT802 DAC board

Chris Stratton wrote:

>
> The problem - there is a black encapsulated power module on the end of
> the board which says "Analog Devices 949" that gets very, very hot -
> the paint is blistered. It appears to be a +5v to +/- something
> converter. When hot the outputs are about +/- 8v and unstable - which
> of course means the dac outputs are unpredictable. I am guessing it
> should be a +/- 12v supply. There is a seperate (-) 10v reference
> device, although it presumably gets its power from this module.

The 949 is a dc/dc converter. 5 in @ 0.6 A +/- 15 out @ 60 mA. @% regulation.

>
>
> Thanks for any ideas...
>
> Chris
>
> --
> Christopher C. Stratton, stratton@...
> Instrument Maker, Horn Player & Engineer
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