Transformer repairs

dwight elvey dkelvey at hotmail.com
Wed May 28 20:21:43 CDT 2008





> From: dr.emiel at xs4all.nl
> To: cctalk at classiccmp.org
> Date: Wed, 28 May 2008 23:12:21 +0200
> Subject: RE: Transformer repairs
>
> You could try one of the CBM clubs, there should be someone who has some
> spares..
> The other option is rewinding the transformer, not the most thrilling
> option..
> The last i had, was suffering of a bad 9vac transformer that one I replaced
> and the PSU was up again.
>
> -RIk
>
> -----Oorspronkelijk bericht-----
> Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
> Namens Ade Vickers
> Verzonden: woensdag 28 mei 2008 21:20
> Aan: 'General Discussion: On-Topic and Off-Topic Posts'
> Onderwerp: RE: Transformer repairs
>
> Rik wrote:
>
>> Maybe this is some help.
>> http://www.zimmers.net/commie/docs/sx64.txt
>> http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c6
>> 4/sx-64/index.
>> html
>>
>> I do have a 22MB pdf file with the schematics, if you got a ftp I'll
>> upload it.
>>
>
> Hi Rik,
>
> Thanks - I found the schematics via Wikipedia (of all places); and the text
> file too (can't remember where that was linked from).
>
>>From the description, I think it's the "+12 volt switcher (2.8 Amps)"
>>that's
> blown; the question is, where the heck would I get one of those from??
>
>
> Here's the pin-out (from the solder side, heatsink towards you):
>
> 240v o o 0v
>
> 240v o o 0v
>
> n/c o o 0v o 0v
>
> n/c o o 12v o 12v
>
> 0v o o 12v
>
> 0v o o 12v
>
>

Hi Ade
 If it is a switcher, it sounds like you don't understand how these work.
Please send a pointer to the schematic you located. We can then talk
about failures in switchers.
Dwight

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