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Help diagnosing two Bits
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spamkiller
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May 22, 2009 18:44 PDT
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Greetings,
I'm new to the list, and am hoping someone may be able to point me in
the right direction with regard to diagnosing the problems with my two
different Bit One keyboards.
1) CEM version - this board was completely functional several months
ago, but now makes no sound aside from some filter resonance on some
patches. Replacing the battery and loading sound dump do no help.
Oscillators cannot be heard at all.
2) SSM version - this one behaves as if I have the mod wheel on all the
time, applying the LFO constantly. Mod wheel has no effect. All voices
and filters are working, and if I disable the LFO via parameter 1, the
keyboard is semi-useable. Noise generator is not audible (although this
is not critical).
Any suggestions as to which components to check or replace would be
greatly appreciated. I have access to a scope, probe, and meter,
soldering experience, but only a basic knowledge of electronics.
Thanks for your consideration,
John
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