ep-70/90 Feb. 2000 BLOCK DIAGRAM ／ブロック図 Main Board Switch Board Tempo Beat IC10 ROM IC14 SRAM LED102---107 / SW101---115 A A D D B&T Board D IP A/D Port ADDRESS BUS A CPU IC6 OP Input Jack Output Jack L/MONO R Pedal Jack Damper Soft PS RAM D A A In Out L/MONO R MIDI A EA WA WAVE ROM Jack Board ED ED WD IC5,7 IC9 IC12 D DATA IC2 IC1 AMP EQ Power AMP IC4 IC7 PD Control LPF D/A PD Mute Control Key Scan D A IC17 IC18 IC19 Reset A. +9V IC16 PD IC5 T PM0-10 SM0-10 Q7 Reset DC Jack Power Switch (Stereo) (Stereo) Speakers Keyboard Phones Jack 4 Volume Mute D. +5V IC6