S/23 machine update card

Jon Elson jonelson126 at gmail.com
Sun Aug 18 20:11:56 CDT 2019

On 08/18/2019 06:38 PM, Dennis Boone via cctalk wrote:
> Folks,
> I've determined that the piece of my S/23 that's causing the power
> supply to blow its 12V fuse is the machine update card.  The manual says
> this provides additional R/W storage for microprogram updates.  That
> sounds like something that wouldn't be necessary for normal operation.
Not knowing anything about this system, but you might check the card for 
a bad Tantalum capacitor.


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