[HECnet] VS4000/60 power supply dead... or not?

[Dave McGuire]

On 02/15/2016 01:53 PM, Jordi Guillaumes i Pons wrote:
> Well, I have replaced the fuse and it is still dead. I have double
> checked the PCB and I have found a part that seems to be charred.
> 
> http://i.imgur.com/4hpUKpb.jpg
> 
> I’m not sure what the big grey things are. I’d guess those are some
> kind of resistors (labeled 2W10% 15K), but I have not seen something
> like that before.

  They are power resistors.

> If so, the one horizontally in the pic seems to be
> burnt. The PCB is charred underneath it, and no current goes thru it
> accordint to my multimeter.

  The little charring on the PCB may be conductive.  I'd clean that off
first, before going any further.

             -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA