Vintage Synth Repair

no actually i think your right on the money.  i was looking at the
block diagrams and found that the last section in the flowchart is the
string section.  so i basically figured i need to work my way
backwards considering that i can hear a slight noise coming from the
the synth output, hinting it might still work.  ill open it up and
check if there are any loose connections.  its previous owner simply
stated that it well taken car of and that it just went out on day.
thanks MU.

p.s. the delta service manual sucks.  no IC or part numbers on the
board screen shots.  which makes it alittle hard to distinguish which
parts go without opening it up.