[Amps] Commander HF-1250 problem

[George]

Hi Doug,
I had a similar problem with an HF-1250.  There is a solid state relay 
(I think there are two, been a while) mounted on the right hand side of 
the power supply compartment and it developed problems.
73, George
W2GS

On 11/18/2013 10:57 PM, doug ferguson wrote:
> Hi,
> My HF-1250 just went out.  It was working fine and then the lights and fan
> started flickering for about 5 seconds and then the whole thing went dark.
> No smells or sounds and no apparent burn marks that I can see.  The power
> supply components involve taking the entire amp apart to check so was hoping
> someone can give me some other ideas before I have to do that.
> The fuses are both good; wall power, the front power switch and interlock switch are good.
> Not sure if these amps have thermal fuses in the transformer? The schematic doesn't show
> one although they usually don't.
> Would a shorted 3cx800a7 cause this?  Like I said, it went slowly and quietly - no bangs,
> pops or smells or broken components that I can see. It just won't turn on.
> Any help on where to start would be greatly appreciated.
> 73,
> Doug - N7NM
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