Re: P4 on sun3/sun3x (Re: NetBSD/sun3 10.0_RC2 problems on sun 3/60)

[Michael Thompson <michael.99.thompson%gmail.com@localhost>]

One on my 3/80 burned, but the system never stopped and still works OK.

> On Jan 19, 2024, at 8:28 AM, Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost> wrote:
> 
> romain@ wrote:
> 
>>> There's a specific tantalum capacitor in one corner of the logic board that *always* blows on the 3/80, and the suggestion I received from numerous people after mine blew was to just desolder the remnant and remove it, and not to bother replacing. I believe they said it's just a filter cap that only really matters if you have super-noisy power or something like that.
>> 
>> Oh, that's good news. The one that blew is C1719 (closest to the angle
>> with the PS connector), is that the one you're talking about?
> 
> Two tantalum caps on my 3/80 were also burnt in front of my eyes
> about 15 year ago.
> 
> IIRC they were near the SCSI connector and I just replaced them
> and the 3/80 is still alive.
> 
> The failure mode of tantalum caps is short mode and it could
> happen even on short time over voltage, so if its PSU has proper
> protection circuit, it's possible that "burning tantalum cap"
> might not cause other damages.
> 
> Thanks,
> ---
> Izumi Tsutsui