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Vintage Synth Repair

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juno106 noisy chorus

2016-06-04 by fainardi83@...

hello all

i am working on a juno106 that is nearly finished but when i activate the chorus I or II there is noisy sound like a sinusoid in my headphone without playing on the keyboard

i read on differnet web site that people who have this problem change both mn3009 and 3101 but noise still there


on the schematic there is ic1 that drive the signal to left and right part and just before the output sigout1 and sigout2 there is the ic6


does any one had this problem ? and how they solve it


thanks


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