H7821 power supply in MicroVAX 3100, SCSI disk enclosures and others
billdegnan at gmail.com
Fri Jan 31 07:27:09 CST 2020
On Fri, Jan 31, 2020 at 8:24 AM Peter Coghlan via cctalk <
cctalk at classiccmp.org> wrote:
> The recent discussion on BSC protocol prompted me to dig out my Microvax
> with DSH32 synchronous serial interface. It had been idle in storage for
> several years and it wouldn't power up, only giving a brief flash on the
> diagnostic LEDs and a quick twitch of the fans. There was a slight smell,
> the stale air that comes out of a deflating tyre.
> If anyone has anything with H7821 power supplies in them, I suggest
> on these capacitors. If anything with these power supplies is in storage,
> suggest ensuring it is stored the normal way up as this should limit the
> ability of the goo to escape and spread around the power supply.
> And there I was thought I was being safe enough by removing the nicad
> packs some years ago...
> Peter Coghlan.
Thanks Peter..My 3100 just smoked up the other day, needs repair or a new
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