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Thanks wangshuang,
But after performing Default Setup the problem is the same - rotary knobs still not working.
Please can you get some feedback from your technical team - what components normally fail on the
keyboard PCB so I can try to repair. Or where I can get a replacement keyboard PCB at reasonable cost.
( You appear to be sure it is this PCB, and not main control board )
It is very difficult to use the equipment in this state. Any help is appreciated - including
further diagnostic suggestions - although i do not have another oscilloscope.
Thanks.
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