> I understand where John is going with the flyback tester... but I
> don't quite understand why 99% of flyback problems can't be found
> with a meter. That is, just by checking the windings for shorts or
> open connections...
>
You can find a lot of "obvious" problems with a meter-- dead shorts,
opens, etc. You can eliminate a lot of suspect flybacks simply by
comparing the readings to a known-good one.
Sometimes flybacks can be bad (or going bad RSN) without being totally
blown. (just a couple windings starting to fuse or something) The only
way I've been able to reliably sniff those out has been to use a Sencore
inductor tester and do a ringing test on the flyback.
From my tests with a plain old DVM I was able to say that when the meter
showed shorts or opens, the flyback was definately bad. When then meter
showed "reasonable" numbers though it was still a crapshoot if it would
actually work or not. (The Sencore was right 100% of the time though.)
-Clay
Received on Mon Aug 17 13:06:01 1998
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