MOTM

I apologize if this is OT for the motm list (let me know Paul), but I
thought I would try my trusty motm colleages first since I know that there
is a lot of good expertise here.

Victim: Korg sd400 analog delay

Symptoms: Does not power up: Worked fine one evening, the next, nothing.

Evaluation so far: After opening up the unit, the fuse looks ok (but
the ends of the fuse appear to be encased in not very clear plastic and
the fuse ends might be soldered directly to the wires from the pushbutton
switch - I can't see the connections clearly without opening up the
plastic).  'On' power light does not light.  Transformer does not become
warm after having the pushbutton in 'on' position for 15 min.  Could it be
the switch (but this did not show any intermittent problems previously - 
mechanically it visually appears to work)?

Being a novice at this stuff, this is as far as I can confidenctly go
without further assistance. I have a DVM.
Any suggestions appreciated.
Thanks, Jeff

Jeff I would see if you can get access to that fuse. It does sound like
loss of power to the transformer. Power switches can go dead like that
too.

With the unit OFF and unplugged from anything, measure the resistance of
the unit between one AC prong and the other. Turn the 'power on' switch
on and off and see if that makes a difference. You should get quite a
low value of resistance, less then 100R or so, when it is on, and very
high when it is off.

If you don't then it could indeed be the fuse or the switch... or worse,
the transformer.

Regards,

Tony Allgood, Penrith, Cumbria, England

www.oakleysound.com