Re: Apple Lisa UK power supply

Hi,

this capacitor (close to the Powerconnector) is for reducing interferrences from the 220V Power Network, only. You should give it a try by simply remove this capacitor tith a wire cutter and insert a new fuse.

Andreas

On Oct 11, 2:38 pm, stevejenner100 <stevejenner..._at_email.domain.hidden> wrote:
> Hey James
>
> Thanks for the quick response, that info is really useful. There are
> currently 4 refurbished 1.2 amp psu's available on ebay item no.
> 140065349601 but they are going for $189.99 each plus shipping to the
> Uk which seems a lot to me so I will try and get my unit repaired
> locally. I'm ok ish with a soldering iron but dont fancy doing a
> repair like this myself.
>
> Can you still get the DataCentre units now? Looked on the web and
> cannot find anyone that sells these?
>
> I had a look inside and the PSU unit does say 620 on the board but
> there are no other numbers after it!?!
> It looks to be in reasonable shape except one largish blown capacitor.
> Ive taken some photos for all to look at.
>
> Whilst looking at the power supply I decided to strip out the cards
> and discovered my Lisa has suffered from the dreaded NiCad battery
> leak on the I/O board - aargh!
> Have removed the offending batteries, and carefully removed most of
> the green corrosion with an old toothbrush and although the batteries
> haven't leaked excessively there is some damage to the board which
> will need to be addressed before I get the machine powered up. Is it
> possible to bypass the corroded areas with some fresh solder, or would
> it be better to run some small wires to each of the circuits on the
> problem areas. Any suggestions will be much appreciated as I would
> imagine finding a replacement I/O board for one of these is like
> trying to find hens teeth.
>
> While we are on the subject of the I/O board, excuse my ignorance here
> but what does the on off switch do just below where the batteries once
> were?
>
> Again I have attached some photos of the offending area for all to
> look at.
>
> Many thanks
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/07AmpUkLisapow...
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/07AmpUkLisapow...
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/07AmpUkLisapow...
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/closeupofblown...
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/Lisaboardcorro...
>
> http://i224.photobucket.com/albums/dd90/stevejenner100/Lisaboardcorro...
>
> On Oct 10, 10:03 pm, James MacPhail <g..._at_email.domain.hidden>
> wrote:
>
>
>
> > >burst capacitor on the power supply but as this is a UK version is rated
> > >at 220v and 0.7 amps.
>
> > >Does anyone here know where I can get a replacement unit or how I go
> > >about getting it repaired in the UK.
>
> > Someone familiar with repairing switching power supplies should be able to
> > fix it. For example, a local TV repair shop.
>
> > If you are handy with a soldering iron, you may be able to repair it
> > yourself, especially if replacing capacitors is all that is required. There
> > are lethal voltages involved, so care and caution are required.
>
> > Note there are two designs of the Lisa PSU, the earlier Apple design and
> > the later DataPower design. When looking for a replacement, the latter is
> > considered more rugged and is very easy to switch to 220V.
>
> > Your PSU, rated at 220v and 0.7Amps, is the Apple design (often referred to
> > as the 1.2A PSU, because of its rating at 120V).
>
> > The 220 and 120 volt variants of the PSUs are only slightly different, the
> > schematics on the internet apply to both. (Which may be useful for repair,
> > or altering a replacement, eg. from eBay.)
>
> > There is further information in the LisaFAQ:
>
> > <http://lisafaq.sunder.net/index.html#lisafaq-hw-pwr>
>
> > I see the LisaFAQ is missing the Apple part number for your variant of the
> > PSU, can you see it on a label on the PSU enclosure somewhere? (Probably
> > 620-xxxx)
>
> > HTH,
>
> > James- Hide quoted text -
>
> - Show quoted text -

--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "LisaList" group. To post to this group, send email to lisalist_at_email.domain.hidden To unsubscribe from this group, send email to lisalist-unsubscribe_at_email.domain.hidden For more options, visit this group at http://groups.google.com/group/lisalist?hl=en -~----------~----~----~----~------~----~------~--~--- Received on 2007-10-11 08:41:35