— 8 —
MAJOR WAVEFORMS
1
Clock pulse COSI
MSM6387-13 pin 8
2
3
Key scan signal KO0
MSM6387-13 pin 30
Key scan signal KO1
MSM6387-13 pin 29
4
5
6
7
Sound signal output
MSM6387-13 pin 5
Filter output
Emitter of Q201
Power amp input
LA4598 pin 6
Power amp output
LA5498 pin 3
Tone : Flute (No.13)
Key : A3
Volume : Maximum
1
2
3
4
5
6
7
50 ns
CH1: 1V
2 ms
CH1: 5 V
–
CH2: 5 V
–
~
~
~
2 ms
CH1: 50 mV CH2: 0.5 V
CH1: 50 mV CH2: 50 mV
2 ms
~
~
CH1
CH1
CH2
CH1
CH2
CH1
CH2
