x0xb0x make click and kick Drum...

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diplowave
 
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Joined: Wed Aug 21, 2013 9:49 am

x0xb0x make click and kick Drum...

Post by diplowave »

hi, i have one x0xb0x that generates a sound that resembles clicks. At times power ON, the pots works, but the x0x générate more click ( a sort of strange env), then a light white noise happens, and after a few moments potentiometer no one works. Then it just generate a sort of bass drum... It's not a synthesizer, it's a drum synth...
I did some measurements, and VCA has abnormal behavior, has osciloscoppe the VCA waveform is not good and almost nonexistent.
The voltage points 1 and 2 of IC15B are too low. I have replaced several components of the VCA without improvements. The VCA has an erratic comportement and i do not know why. Yet there are a few months back, these x0xb0x that worked very well.
This is the first time, i can not repair a x0x....

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