Apple III Power Supply: Success (I think...)

[Alexandre Souza]

> I opted to do a wholesale replacement of the electrolytics in the power 
> supply, since I was likely going to be removing all of them to test them 
> anyway and there's only a handful to take care of.  $9 worth of parts 
> later, the issue seems to be resolved -- the system powers up and runs 
> diagnostics. (Though it keeps cycling, so I don't know yet if that's 
> another problem or normal behavior :)).

    In SPSUs it isn't always the wise way. Some of your old capacitors 
surely are low-ESR types (you can spot them because they are 105º capacitors 
and the high-esr ones are 88º) and it can mess the regulation of your power 
supply. Have a multitester around? Know how to use it? Measure the voltage 
of the outputs of the PSU and see if everything is ok. If you still have the 
old capacitors, take a look if any of them has 105º written on that.

    Greetz from Brazil
    Alexandre