|
Posted by glenn P on July 12, 2006, 10:38 pm
Sorry, I just remembered you said it was short already!~) I hope you shorted
it anyway before you measured it, is what I meant to say!
> It's a half-wave voltage doubler circuit.
>
> The value you installed shouldn't present a problem, even though it is
> outside the original spec. The Voltage rating IS critical, as you probably
> have guessed.
>
> I hope you shorted that cap with a very well insulated screwdriver before
> you pulled it.....
>
>> My microwave died and I found a shorted capacitor. Replacing the 0.9 uf
>> 2300 vac capacitor (+/- 3%) with a 1.0 uf 2100 vac capacitor got the oven
>> working again with no noticeable difference from before. Can someone
>> tell me what changing from 0.9 to 1 uf will do to this circuit? Better
>> yet, tell me what the capacitor is doing? Its connected to the
>> transformer on one side and to a diode anode on the other. The magnetron
>> connects to the diode anode also. The diode cathode goes to gnd. Is
>> this some sort of voltage doubler? Looks to me like its a short circuit
>> to ground for all the positive half cycles out of the transformer, so an
>> explanation would be nice. Also the capacitor is +/- 3% which I've never
>> seen before, being more familiar with +/- 10% or even +/- 20%. Why so
>> tight on the tolerance?
>>
>
>
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap