Juno 106 Loud Key Help!!!

[dreamuurr]

So I just bought a used Juno 106. Some of the notes are louder than others, almost seems like the filter is open. If I play a closer key or other surrounding keys, the specific key in question will work but others will do the same thing. Read some forums but cannot get a definitive answer. Could be a chip or battery. Any help would be appreciated!

[Gilmour928]

Could potentially be the calibration of one of the voices. Look at the service manual and put it into test mode (Hold Key transpose and turn power on). There is a cyclic option for one of the test modes, so each time you press a single key it will cycle through each voice 1-6 in order. Which ever number key press, is the voice number which needs calibrating.
It sounds like it could be the VCA gain or the VCF resonance, but it will be hard to calibrate without an oscilloscope.

https://www.synthxl.com/wp-content/uplo ... Manual.pdf

Theres the service manual it may help you diagnose the issue.