User manual BOSS DR-5

[. . . ] Mhen the STOP switch S6 is turned ON, the Q output goes to L and the Clock Generator stops oscillation. [. . . ] 2 CLOCK GENERATOR (2/4 IC3) This the is The frequency of this oscillator is controlled with TEMPO VR-5. oscillator functions in PLAY mode only, and feeds clock pulses to Counter (5) 3 SCHIMITT TRIGGER (Q15, 17, 18) This circuit functions in WRITE mode only. The collector of Ql5 goes H when either the START switch S5 or the STOP switch S6 is turned ON, and goes to L when the switch set to ON is turned OFF. 4 DELAY CIRCUIT (Q16) The output from the Schmitt circuit (3) is intergrated, and fed to the base of Q16. As a result, the data is guaranteed to be stored as long as the dry cells maintain voltage value higher than a specified. The capacitor C39 (22 mfd. ) connected to the terminal Vcc can substitute for the dry cells by its charge for several minutes when the cells are absent during replacement. 7 VOlCE GENERATOR (Ql, 2, 3, 7, 8, 9, 10, ll) BD, SD and RS are triggered by pulses from the respective DO's. HI HAT is triggered by pulses from the counter IC2 or the Clock generator IC3 by every step or every other step. [. . . ] 8 ACCENT (Q3) Each sound source output is mixed and outputted through the resistor network in which Q3 is connected in parallel. When ACCENT pulse is outputted from DO l, Q3 turned ON, and in this ON period the signal amplitude increases. [. . . ]