[sdiy] Roland TR-909 PSU and reset circuit, replacement

[Colin f]

> The transformer in my TR-909's PSU has gone, and I can't seem 
> to find a suitable replacement (it's chassis-mount, and is 
> the sole physical support for the PSU PCB), so I'm thinking 
> of replacing it with a SMPS if I can find a suitable size, 
> maybe something like this one...
> http://www.mean-well.com.au/shop/product.php?id_product=74
> to give me the required +/- 15 volts and +5 volts.

I replaced a dead 909 transformer with a pair of toroids, using some alu
angle for the support.
See:
http://www.colinfraser.com/tr909/909psu1.jpg
http://www.colinfraser.com/tr909/909psu2.jpg

This was a drop-in replacement.

Cheers,
Colin f