Help Recognizing early Apple II PSU

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Help Recognizing early Apple II PSU

Hi,

I have this Power supply but don't know if is original or a Clone. Outside stands it's 115V/ 60Hz, but inside has a RFI filter 230V/ 50-60Hz

It's an A2M001 and 820-0003-01 is written on the PCB.

Thanks.

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Image icon IMG_9253.JPG1.73 MB
Image icon IMG_9254.JPG1.99 MB
Image icon IMG_9255.JPG2.12 MB
Image icon IMG_9256.JPG1.04 MB
Image icon IMG_9258.JPG1.12 MB
Image icon IMG_9259.JPG2.52 MB
Image icon IMG_9260.JPG1.43 MB
Image icon IMG_9252.JPG2.25 MB
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That is the power supply

That is the power supply Apple used before the Astec supplies

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David_M wrote:That is the

David_M wrote:
That is the power supply Apple used before the Astec supplies

Yesterday it stopped working, no voltage through that rfi EF1 filter...

Thanks.

 

 

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Sadly. a lot of older Apple

Sadly. a lot of older Apple power supplies need rebuilt these days.  The caps in particular go bad over time.  I'm not sure I'd rebuild that one due to its collectible nature.  I might be inclined to store it as-is and buy a new power supply to use instead.  You can go two ways on that, buy a used Apple power supply of newer vintage and maybe rebuild it if necessary or buy one of Henry Corbis's brand new ones from ReActiveMicro

 

https://www.reactivemicro.com/product/ultimate-universal-power-supply/

 

Either way I'd probably keep the original one as-is.

 

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Well, I have some spare ones,

Well, I have some spare ones, that are more modern... but the point is having the system as much original as it used to be and time to time start it up like an old car.

By the way, any page or document for fixing that kind of  Power supply ?

I only know this :

http://www.appleii-box.de/D04_allabotpowersupplies.htm but it's only related to Astec

 

 

 

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Well, where I'd start is

Well, where I'd start is checking to see whether the power supply functions if you bypass the RFI filter?  If so, then you somehow have to find a replacement for that part.  It looks like something that was probably pretty commonly used back in those days, so you may be able to find one from another power supply, possibly from some other kind of equipment.

 

 

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Also I'm assuming you've

Also I'm assuming you've tried jumpering across the power switch.  Those rocker switches often fail, so that would be the first thing to try even before the RFI filter.

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What I did is try to open

Have you tried to replace that filter?

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What I did is try to open

What I did is try to open that filter, now I know I’ve shouldn’t done that...So need to get a new one.(already ordered). I tried to overpass that filter but was through the switch but didn’t work so may be there could be the problem. I’ll Try it today through a direct connection to the coil.

thanks

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I checked the voltage throug

I checked the voltage throug the filter and is 130V also the switch so I connected it and no 12/5V on the other side... 

 

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See topic Repairing Apple II power supply

The schematic is in the Reference manual. This supply is difficult to repair since I  could not find the Bill of Materials or  component layout drawing.

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