Blowing Fuses

[Jim Stout]

So I just pulled my EII out of storage from my move to Austin.

I flipped the power switch on and it made a little pop sound and nothing happened 

So I opened it up see that the fuse has gone out on the PSU

I put in another 5A 250v fuse (fast acting) and it did the same thing.

any suggestions?

[HideawayStudio]

So I just pulled my EII out of storage from my move to Austin.

I flipped the power switch on and it made a little pop sound and nothing happened 

So I opened it up see that the fuse has gone out on the PSU

I put in another 5A 250v fuse (fast acting) and it did the same thing.

any suggestions?

Almost certainly your power supply - these are sadly very prone to failure with age.   It is fairly unlikely to be anything else.

The caps dry up due the amount of heat generated and eventually they go short circuit.    You really must get the PSU checked out before you try again because you run the risk of damaging your digital/analog pcbs.

[Jim Stout]

That's what I figured...

Anybody know where I can send this power supply to be check out?

[dr.c]

Just buy anotehr one, new. It will be cheaper ! Look on the net by taking the reference on the transformer

[HideawayStudio]

Just buy anotehr one, new. It will be cheaper ! Look on the net by taking the reference on the transformer

I'm pretty sure this PSU has been out of production for years.   I'd be tempted to send it off to a TV repair shop for testing/repair - it's easily within their capability.

I am looking into sourcing an modern universal PSU to replace the old PSU - there is nothing special about the EII PSU it's just that there are quite a few rails and this will almost certainly require two PSU's mounted on the same chassis plate - one for the computer and one for the analog output stages.  The good news is that this is very feasible as modern SMPSUs are MUCH smaller than their old counterparts due to higher chopper frequencies making the magnetics so much smaller.  I should have something in place by the end of the year for sale to other EII owners.

[dr.c]

Another advantage : if you power the original E2 PSU without a load, it will BLOW and DIE.

If you do this with a modern one, it whistles, you just have to shut it down and verify the connectors. They are as well protected against shorts at the output, and las but not least, swich automaticaly 200/110V

Swell, uh ?