[time-nuts] Anyone familiar with SR-620 repair?

[Magnus Danielson]

On 03/23/2012 09:30 PM, J. Forster wrote:
> I should have added that you can get a pretty good idea of whick branch on
> a PCB is drawing current by probing along the trace. This is especially
> useful if the rail has a bunch of branch distribution lines.
>
> Also, if the three-terminal regulator is overheating, disconnect it and
> power just that rail from an external, current limited supply of a volt or
> two. That way you don't risk trace damage.

I would toss the TDR on it just for the fun of it, but a miliohm 
measurement should also help to locate it. Otherwise if there is no 
direct evidence (hot cap or other chip) lifting legs of caps on 
speculation can be a starter.

Cheers,
Magnus