Hi all,
The correct mains fuse value for a stock PS-3 is 5 amp slow-blow, as Brian
says. I THINK that the Sytek rebuilt units have up rated transformers which
could account for the 7 amp fuse on your spare supply. If the fuse has
vaporized, the most likely culprit is a failed bridge rectifier. Any competent
tech should be able to replace it.
Best
Ike
Ike Zimbel
Zimbel Audio Ltd
416-720-0887
www.zimbelaudio.com
Sent from my iPhone
On 2011-04-19, at 9:44 PM, Tommy Mokas <[email protected]> wrote:
> Thanks for the response Brian. Well, the fuse is definitely blown, which is
> disheartening at this hour...but alas, I'm going to go get more fuses right
> now, and I'll report back soon. Hopefully its something simple, although I'm
> doubting it is for some reason. Anybody have a neotek tech in NYC, in case I
> need to make that call?
>
> On Tue, Apr 19, 2011 at 9:05 PM, Brian Roth <[email protected]> wrote:
> If the inside of the glass tube of the fuse has black "crap" blown all over,
> that sounds as if there is a short circuit somewhere inside the power supply.
> But, if the wire link inside is merely broken, it could be a case of "who
> knows?"
>
> I don't have schemos for that unit, so I can't say whether 5 or 7 Amps is
> correct. It almost certainly needs to be a slow-blow type. I think you will
> be OK trying a 5A slow-blow in there to see if it blows again. If it blows
> again, STOP and have the PSU serviced. If the fuse holds and the desk works,
> the next step would be to see if 7A is actually the correct value, which
> could explain the blown 5A.
>
> Best,
>
> Bri
>
>
>
>
> On 4/19/2011 19:09, Tommy Mokas wrote:
> Hello Neoteks,
>
> Quick question, if the fuse on the back of the power supply blows,
> what should be my main concerns? There was no other reason for me to
> believe that the power supply wasn't functioning correctly until my
> biz partner went to turn it on and it didn't power up. I just got back
> into town to find a blown fuse in the back.
>
> The fuse that was in it was a 5A 250V 3/3. However I have a backup
> power supply (which I've never needed) that has a sticker indicating a
> 7a fuse. I assume this referring to amps, but I want to be sure. Is it
> possible that the other power supply (which apparently serviced in
> '96) has a changed value on this particular fuse? Is that a mod done
> to these?
>
> And for my final question, am I risking the power supply by putting
> the same fuse in only to have it blow again? I don't want to do any
> more damage but I do have work to do :). Any insight is really
> appreciated, especially if you're a night owl such as myself. Thanks
> so much!
>
> Best,
> Tommy Mokas
> Casa Nova Studios
> www.twitter.com/tommymokas <http://www.twitter.com/tommymokas>
> www.twitter.com/casanovastudios <http://www.twitter.com/casanovastudios>
>
>
>
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