Re: IIc keeps tripping the circuit breaker

[Stephen Shaw <bottrawler@junkbuster.zzn.com>]

On 06 Aug 2002 08:04:09 GMT, Michael J. Mahon wrote:

> Matthew Russotto replied:
>
>>In article <3d4d7947_3@news3.prserv.net>,
>>Tom Zuchowski <tzuchow@attglobal.net> wrote:
>>>
>>>There may be a line filter or an MOV across the AC lines before the fuse.
>>>MOV's are those big (approx. quarter-sized) red or black disks found near
>>>the AC power input. One failure mode of an MOV is to get leaky over time,
>>>and the breaker is maybe popping before the MOV smokes itself? You could
>>>test this easily enough by temporarily removing any MOV you see.
>>
>>Might as well permanently remove the MOV, unless you're going to replace
>>them; by now, they're dead anyway.
>
> An MOV's (Metal-Oxide Varistor's) typical failure mode is "open", not
> "shorted", so it is extremely unlikely that they would be intermittently
> shorting to produce the questioner's problem.  (Not impossible, just
> extremely unlikely.  ;-)

It happened with our "Chairman"'s system saver. Removal of the MOVs stopped the
tripping.

>
> Much more likely is a simple intermittent short in the power cord,
> probably near the plug or the strain relief at the monitor.
>
> -michael
>
> Check out 8-bit Apple sound that will amaze you on my
> Home page:  http://members.aol.com/MJMahon/

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