Roland JP-6 schematics index page

Page 1a – Specifications, external photo, and outside case part numbers
Page 1b – Open photo showing boards, button, knob, and switch part numbers
Page 2a – General circuit description, CPU pin-out and logic symbol
Page 2a detail 1 – CPU pin-out and logic symbol
Page 2b – Block diagram, CPU pin function, Slave CPU (module board)
Page 2b detail 1 – Block diagram
Page 2b detail 2 – Program / Memory Read Cycle Timing

Page 9 all – CPU board schematic
Page 9 detail 1 of 2 – CPU board left half blow up
Page 9 detail 2 of 2 – CPU board right half blow up