[sdiy] Korg PS-3300 help?

[JH.]

Yes, and if the supply voltages are ok after power-on, monitor them while
you play
and make it crash. And check all the connectors!

JH.



----- Original Message ----- 
From: "Fahl, Romeo" <RFahl at extensis.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 09, 2005 7:28 PM
Subject: RE: [sdiy] Korg PS-3300 help?


Have you checked what the power supply is doing?  It could be that
there's an old cap that's giving up the ghost.  Just a guess...



________________________________

From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Peter Forrest
Sent: Friday, May 06, 2005 4:00 AM
To: analogue at hyperreal.org
Cc: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] Korg PS-3300 help?


Can anyone offer suggestions to cure a bizarre fault on a
PS-3300?
The instrument plays fine, and sounds wonderful..... for about
ten minutes.  Then, if a three or four note chord is played, it goes
berserk.  Lots of notes trigger at random. A great abstract sound.......
but...!
Switching the machine off then on after 10 - 30 secs brings the
power light on, but no sound and NO LEDs flashing.
Switching it off and on again after that usually gets it working
properly again....... but only for 5-10 minutes before the next crash.

The 60-way keyboard lead contacts have been cleaned; no
improvement.

Any thoughts or suggestions gratefully received.
Peter