Casio CTK-731 Service Manual

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MAJOR WAVEFORMS
1 Clock signal for CPU
Check point CP1
2 Clock signal for DSP
Check point CP2
3 Voltage VDD
IC3 pin 2
4 Reset signal RES
IC3 pin 1
1
2
3
4
5 NMI signal
LSI9 pin 64
6 Reset signal RESB
LSI9 pin 87
7 Sound signal L-OUT
JC connector pin 10
8 Sound signal L-VOL0OUT
JG connector pin 5
Tone: Clarinet, Volume: Max.
Touch speed: Max., Key: A4
5
6
7
8
9 Key common signal KC0
JB connector pin 1
0 Key common signal KC1
JB connector pin 2
A Read signal for RAM1
LSI7 pin 24
B Write signal for RAM1
LSI7 pin 29
9
0
A
B

Casio CTK-731 Specifications

General

Brand	Casio
Model	CTK-731
Category	Electronic Keyboard
Language	English