On Tue, 2005-05-17 at 12:20 +0100, Howard Winter wrote:
> Russell,
> 
> On Tue, 17 May 2005 00:20:38 +1200, Russell McMahon wrote:
> 
> > Anyone know offhand the power transformer secondary voltage for a "JBL 
> > eon Power 10 powered speaker".
> > I have a dead one. JBL locally can't or won't tell. Google more than 
> > usually reticent.
> > Probably around 40-0-40v.
> 
> As a matter of interest, how did you manage to blow it?  
> 
> It may have a thermal fuse wound into the outer layers of insulation - if you unpeel it carefully (those wires 
> are likely to be very fine and easily broken) you may be able to short it temporarily and measure the 
> secondary voltage.  Don't be tempted to solder in a new thermal cutout - the clue is in the name!  :-)

It's a good idea, but let me add that in my experience, in cases where
the thermal cutout tripped, it's entirely possible that the insulation
on some of the windings has melted, shorting some windings together.
This would result in you getting the wrong voltage.

Just something I wanted to add if one does want to take that route. TTYL

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