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Edited by user567121 at 2020-10-20 04:25
good to hear that you solved it
Is it 100% fixed for you now?
I will resolder and investigate mine too. Was it perfectly working after you made one knob (the faulty one) inactive by desoldering its diode and this defective knob was suppressing all the other knobs? You say you did it other way round, you desoldered all diodes and put them back one by one and suddenly all began to fail. right?
And the source of evil was the knob itself you say..? but there was nothing strange with it..
Hope i can trace my error the same way down to a rotary knob. If you had the same faulty behavour like mine before then i think chances are good. (mine fails most of the time complete on all knobs, buttons also don't work, sometimes out of nothing they work perfect for a couple of seconds or minutes just to fail completely and won't get back to good, or only for a short time - i did a resolder on almost every part and connector and tried to check the keyboard cable etc..no changings, haven't try to investigate signals of the knobs itsef which would be interesting i think (i'm no expert in this, more general electronics) but because measuring the board without another oscilloscope on an open case and a mirror makes you crazy in no time)
hope the best, regards
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