Re: replacement parts

From: Michael (quadfour_at_iinet.net.au)
Date: 03/12/05 

Date: Sat, 12 Mar 2005 22:21:39 +0800

On Sat, 12 Mar 2005 05:08:54 +0000, Ross Herbert wrote:

> On Sat, 12 Mar 2005 04:24:51 GMT, Ross Herbert
> <rherber1@bigpond.net.au> wrote:
>
>>On Fri, 11 Mar 2005 21:33:58 +0800, Michael <quadfour@iinet.net.au>
>>wrote:
>>
>>>There are 2x1uF 250V bipolar electrolytics that I've circled in red on
>>>the image:
>>>
>>>http://members.iinet.net.au/~quadfour/caps.jpg
>>>
>>>I need to replace them as one has started leaking, and polarised caps just
>>>go bang. I don't know enough about electronics to figure out what they do
>>>exactly, but I need to replace them with something else as I cannot find
>>>any 250V replacement bipolar caps (just finding 50V ones). Ideas?
>>>
>>>Cheers
>>>Michael
>>
>>Since these series caps are essentially connected between mains supply
>>and earth (via 12V zener which has negligible volt drop on negative
>>half cycles and 12V on positive half cycles) you should not use any
>>film capacitor rated simply at 250Vdc as Travis suggests. You could
>>replace both caps with a single 470nF,250Vac X2 rated film cap such as
>>Jaycar RG-5240. You need to make sure you have sufficient space on the
>>board though.

Thanks Ross, those caps seem to be doing the trick. I've got 2 monitors
the same, working nice in both :)

Cheers
Michael

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