Major Waveforms - Casio CTK-50 Service Manual

1
~
CH1: 1V
1
Clock pulse COSI
MSM6387-13 pin 8
4
5
~
CH1: 50 mV CH2: 50 mV
4
Sound signal output
MSM6387-13 pin 5
5
Filter output
Emitter of Q201

MAJOR WAVEFORMS

50 ns
2 ms
~
Tone : Flute (No.13)
Key : A3
Volume : Maximum
2
CH1
3
–
CH1: 5 V
2
Key scan signal KO0
MSM6387-13 pin 30
3
Key scan signal KO1
MSM6387-13 pin 29
CH1
6
7
CH2
~
CH1: 50 mV CH2: 0.5 V
6
Power amp input
LA4598 pin 6
7
Power amp output
LA5498 pin 3
— 8 —
2 ms
–
CH2: 5 V
2 ms
~
CH1
CH2
CH1
CH2