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> Also, theI've don't recall seeing sockets for the CEM's in a JP6.
>sockets on the Jupiter-6 can sometimes allow chips to walk
>out. Gently (and anti-statically) push down on all the socketed
>devices to make sure they are seated correctly. If you have
>steady hands and a clean repair area you may also try pulling
>the chips and scraping off any oxidization with a scribe and
>putting them back.
>Calibration won't bring back a dead CEM.
>Get the service manual and follow the complete calibration
>procedure to the letter. The Jupiter-6's design and layout
>is fairly elegant so it is not difficult to do this.
>Good advice, though again I don't recall any sockets in JP6's.
>To see if it really is your CEM chip, try swapping it with
>another voice's. If the bad voice moves then you know it
>is the chip.
>CEM's blow just for the hell of it all the time.
>If you find that it is the chip then do not stop there. A
>healthy Jupiter-6 does not blow voice chips without permission.
>You almost certainly have a power supply that is out of spec.Boo!.. wrong. Bad advice.
>Check very closely with a scope the + and - power railsAgreed.
>on the voice boards. There should be no noise and no AC coupling.
>Old capacitors on the voice board could need replacingDoubtful.
>Price a new JP6 power supply from Roland and I bet it'll cost a lot
>If there is any hint of a bad power supply then get a new one
>in right away. You will find power supplies are a lot cheaper
>than CEM chips and a lot of problems seem to vanish with a
>clean power supply.
>Some do, but switchers have come a LONG way.
>Finally, do not replace your power supply with one of those
>cute little switchers. Their cuteness hides a fatal flaw;
>they are so noisy!!!!! Use only a linear power supply.