Re: HELP Lisa dead 150W Power Supply

From: Scharpf Thomas <thomas_at_email.domain.hidden>
Date: Sat, 29 Dec 2001 08:57:46 +0200

Hi everybody out there in the a-lot-of-dead-power-supplies-land.

>Von: James MacPhail <uo957_at_email.domain.hidden>
>An: <lisalist_at_email.domain.hidden> (LisaList)
>Betreff: Re: HELP Lisa dead 150W Power Supply
>Datum: Fre, 28. Dez 2001 23:43 Uhr

> The 1.2 A and 1.8 A power supplies are very different as you say. I believe
> the 1.8 A one was supplied to Apple under contract, hence no schematic
> 'leaked' from Apple.
> "Usually" the failure of a Lisa power supply is typical of a switching
> power supply. (Leaking high voltage capacitors, blown flyback transistor,
> fried rectifier diode...) so it usually doesn't require a schematic to fix.
> I suppose there are plenty other failures that cause the power supply to be
> forgotten on a shelf awaiting repair, I think I have a couple of those.
> If anyone does find a schematic for this power supply, please let us all
> know, I suspect many of us care.
> Otherwise, perhaps someone can volunteer to draw it?
> (Or even volunteer some funds to commission it)
> To start, I would suggest Capilano DesignWorks... the lite version is $40,
> free demo.
> James

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Received on 2001-12-29 03:39:35

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