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

SAIDJACK at aol.com SAIDJACK at aol.com
Fri Mar 23 22:14:10 UTC 2012


Shouldn't be too bad, a 10uF cap would have 15 Ohms impedance at 1KHz,  150 
Ohms at 100Hz, and one could inject at different places on the trace... 
away  from the big bypass caps.
 
Doing the same with DC and a simple multimeter should work too.
 
bye,
Said
 
 
In a message dated 3/23/2012 14:31:42 Pacific Daylight Time,  
jfor at quikus.com writes:

>  Here is a trick or two that may work:
>
> feed a very small AC  voltage with say 1KHz and 10mV into the bad power
> rail. It won't hurt  anything.
>
> Then use an old cassette players' magnetic pickup  and amplifier to  
follow
> the signal to the short. No need for  expensive hall effect meters.

Good bypass caps are near AC shorts. I've  not tried it, but am not
optomistic. It would work on stuck signals lines,  but not well on  power,
IMO.




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