Major Waveforms - Casio CTK-431 Service Manual

1
1 Clock pulse
MSM6755C-17 pin 32
4
5
4 Button scan signal KO6
JA connector pin 14
5 Button scan signal KO7
JA connector pin 15

MAJOR WAVEFORMS

2
3
2 +5 V source DVDD
3 APO signal
6
7
6 LCD common signal COM9
KS0066U-10B pin 55
7 LCD common signal COM10
KS0066U-10B pin 56
— 8 —
JB connector pin 4
JB connector pin 8