[Coco] OT: Assist request identifying a component on a PSU board of an Osborne 1b

[tonym]

I plan on it. There's 2 others, smaller .01uF caps, and you can see the cracking in the yellow cases beginning.

I've ordered (3) of the larger .1uF caps, and 6 of the smaller .01uF caps from Digi-Key.

Thanks for the advice all - I'll advise when the parts get here, and get replaced.
I've already unsoldered the three old ones.

Cheers!

Tony
tonym at compusource.net


---- Original Message ----
From: "Bob Devries" <devries.bob at gmail.com>
Sent: 6/9/2014 12:57:59 AM
To: coco at maltedmedia.com
Subject: Re: [Coco] OT: Assist request identifying a component on a PSU board of an Osborne 1b

I would suggest that the failure of this component is in fact quite 
common in the power supplies of older computers. I had a similar 
situation with two of my Acorn BBC-B computers. Simply replace the 
capacitor, and see how you go. One of my BBC's worked fine without the 
capacitor, although I did replace it.

Regards, Bob Devries
Dalby, QLD, Australia

On 9/06/2014 2:36 PM, Steve Batson wrote:
> You should keep in mind that the capacitor may have blown because something else shorted out. It is possible that the capacitor just died  because of age or some type of defect, but is also very possible that something shorted out and blew the capacitor. I would suggest having a friend or someone with some electronic repair take a look and possibly help with the repair.
>
> Best of luck with this :)
>
>
> On Jun 7, 2014, at 5:01 PM, tonym <tonym at compusource.net> wrote:
>
>> My Osborne 1b decided to let out the magic smoke a few weeks ago, so I ran out of smoke.
>> Need to reload the smoke, but need to identify what a component is
>>
>> Pic of the part:
>>
>> https://pbs.twimg.com/media/BpkL9kqCYAEbmDz.jpg
>>
>> It's the component that says "0,1mF @X" on it.
>> On the side is says (I think) f0=4,9mHz 250V ~MP - so it has a capacitance value and a frequency.
>>
>> This particular O1b is special to me, as I've had it since about 1989.
>> Also happens to have the Osborne Compac pocket modem, has an OCC dd upgrade, and a Nuevo 80-column upgrade, and a later ROM I burned to EPROM.
>>
>> Tony
>> tonym at compusource.net
>>
>> -- 
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>
>
>
>


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