I would say clean all the chips. If there is still leak thru, post again. I found 100-200k or so resistors on the vca input to the chips (to gnd or pwr, i don't remember, don't have my 106 anymore), largest selected to just cut off the sound, worked pretty well. I will hunt down the schematics and give more detailed guidance if need be. I suppose one might try the fix without cleaning, I don't know....
Hugh
On Jun 18, 2013 2:04 PM, "NoëlBuhagiar" <laser@...> wrote:
Ok.. put IC13 & IC11 in acetone for about 1 week13 could be done but 11 was stubborn so I replaced the solutionand put back in for 1 or 2 days then ok.I then noted the container I used was not really air-tight and could bethe acetone solution deteriorated as when I replaced it with fresh oneI got good result with the second IC. Now I got voice 1 & 2 back, good.However now I have a hanging note faded in the background as soon as synth switched on(as originally as before besides voice 1 & 2).Do I have to deal with all these ICs or I could use Test mode to pin point the faulty one?Thanks for help!NoelFrom: Malte RogackiSent: Thursday, May 23, 2013 10:30 PMSubject: Re: [vintagesynthrepair] Roland Juno 106S - note stealing ??Sounds like the typical chip problem.
Run the following test: Power up the Juno while you hold the "Transpose"
button down. The press bothe "Poly1" and "Poly2" at the same time so both
lights are up. Press "Bank 2" and then press any note six times. The active
voice is displayed in the readout. You'll see which voice is dead.