A1200: now a PSU issue...

[Jabaruk1]

Its your lucky day i,ve a AT psu wired with an amiga cable which powered a A1200 Tower with 040 and extra,s ,the towers sat doing nothing as i got a compact flash to ide converter and dont need a big psu anymore, mail me if ya want it jabar@jabar.karoo.co.uk :-)

[starf81]

Yes, I've already tried to check the edge connectors.

Regarding the +5, where can I measure it on the Apollo? I don't have a schemathic to identify the +5v rail. I can only find the +12 where I wire the fan.

Alex

[Karlos]

One of the pins on the oscillator should be 5VDC - you'd need to check the pinout for it though.

[Stedy]

@starf81,

Check for the +5V and 0V here:



I have indicated where to probe, I can't remember which is +5V and 0V but you will soon see on your DMM.

Once you find which is +5V and 0V, connect from your ATX PSU to your Apollo card using one of the floppy drive connectors of the PSU. It may sound daft but I had to do a similar thing to get my damn SX32 to work, once I had done that, it worked fine.

As a guide, the +5V rail should be above 4.85 Volts when measured with a DMM for the CPU to work, this allows for 100mv of noise the meter will not 'see'.

[starf81]

Well, just changed the Apollo with a Blizzard 1260 all work correctly. Strange, very strange... the previous Apollo's owner confirms me that it works well on its machine.

However, now my A1200 is 100% working!!!

Thanks for your help!

Alex