Amiga 600 Power Supply

[SteveSJB]

Hey all,

Last night, just as I was about to have a night of passion with my 600, she decided I just wasn't right for her and left me.

After 2 hours of having her in bits, multiple visits to websites and trying all the tricks I know - eg. reseating rom, cables, cleaning - She still decides not to come back.

I will never throw her away - i'll keep her as spares and just buy another 600 off ebay.

However, before I do that, there is one thing I have not tested, the power supply.  When it comes to testing electrical components with a multi-meter - I am an absolute novice.  As such I have a couple of questions about it - please be aware though since I am such a beginner with testing, I need things explained simply and in detail. (I don't really want to blow myself up :-) )

After looking at websites, I understand that there are 5 pins - 1=  +5v 2=  Shield Ground 3= +12v 4= Signal Ground 5= -12v

1. I take it the power supply needs to be plugged in and switched on?
2. Do I start with the NEG meter terminal on pin Ground and POS on pin +5v and see if it reads around 5v
3. Same, but with the POS on +12v and make sure it reads around 12v

Anything else you can add would be very appreciated.

Many thanks in advance.

-Steve

[SteveSJB]

Many thanks for a response, I will try what you suggest and will probably print the results here to see if they are ok.

thanks again

[SteveSJB]

Ok the results I get are:-

 14.28V
-14.39V
  5.14V

Are these results ok?

Many thanks

[SteveSJB]

Yeah I forgot to say I had no luck when using the Shield GND, had to put the NEG probe on 0V GND instead.

Retested and got the following results:-

13.80v
-14.25v
5.29v

Unfortunately, I don't have a spare PS to check

[SteveSJB]

Hi, ty for a response.

I take it then that trying to repair a power supply is too advanced?

Thank you for the offer of another 600 PS, how much would you want for it?

Many thanks.

[SteveSJB]

Just to give you all a quick update, I received a new (2nd hand) Amiga 600 today in the post.

New Amiga + New Power Supply = Working
New Amiga + Old Power Supply = WORKING!
Old Amiga + New Power Supply = FAULTY!

Very strange, that means that there was a problem with the Amiga all along and the power supply was fine!

Many thanks