I was trying to fix my 707 high tom fader as had some faulty one. I have done it several times without problems. After resoldering new fader i decided to check if it work without screwing all parts together. When I turned 707 on it seemed like everything was working fine after what it turned off and gave a smell. 

I checked the both voltages in power supply and in roland plug with adaptor and without - everything is ok in there... 

Is there anyway I can fix it Thanks