On Nov 7, 3:47 pm, "robb" wrote:
wrote in message

ps.com...

On 7 Nov, 20:40, "robb" wrote:
...

As someone else pointed out, 73 ohms at 5V means a static draw
of 5/73
= (about) 68 mA, which for a digital circuit sounds reasonable
imho.
It is definitely not a short. What's the fuse rating on the 5V
rail?

the fuse was a "T 630 mA 250v" so slow blow bussman type fuse

originally the 5v fuse blew i checked transformer out put then
replaced and powered and then all three fuses blew the 5v 12v 30v

maybe i need to take a closer look at the power regulators again

Yeah - I was thinking that the fuses were on the DC rails, but reading
your original post again you state that they are between the
transformer and rectifiers. But you also said that there were two
rectifiers (on 8 [or 12]V, and on 32 [or 30]V). What about the 5V
rectifier? And did you check those
bridges for shorted diodes? That continuity wouldn't necessarily show
up downstream (especially with the fuses blown).

TM