[HECnet] Vaxstation 4000-60 dead...

[Jarratt RMA]

First thing is going to be to get the PSU out of the machine and connected to a
dummy load. Then check whether the PSU is outputting anything, check each
voltage as it might be only one of the outputs that is not working. It might not
even be the PSU that is the problem, but if fans are not running then I suppose
the PSU is the main suspect. You could check all this without disconnecting it
from the machine, depending on whether you are worried it might damage the
machine further if you try to switch it on. It really could be anything at this
point though, perhaps just a fuse, bad electrolytic capacitors, a blown chopper
transistor or goodness knows what else. You have to go through a process of
elimination....

Regards

Rob

> 
>     On 22 October 2015 at 20:30 Hans Vlems <hvlems at zonnet.nl> wrote:
> 
> 
>     Change capacitors‎ perhaps? Had it been switched off for how long?
> 
>       Origineel bericht  
>     Van: Jordi Guillaumes i Pons
>     Verzonden: donderdag 22 oktober 2015 20:10
>     Aan: HECnet Mailing List
>     Beantwoorden: hecnet at Update.UU.SE
>     Onderwerp: [HECnet] Vaxstation 4000-60 dead...
> 
>     Hello,
> 
>     My Vaxstation 4000-60 seems to be dead, probably due to a PSU problem (it
> does not power on). Does anyone know about options to find a replacement or to
> diagnose/fix it? (I just noticed it is dead, I have not even dissassembled it
> yet).
> 
>     Jordi Guillaumes Pons
>     jguillaumes at me.com
>     HECnet: BITXOV::JGUILLAUMES
> 

>
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