Major Waveforms - Casio CTK-573 Service Manual

1
2
1 Clock signal for CPU
LSI4 pin 15
2 Clock signal for CPU
LSI4 pin 16
5
6
5 Key common signal KC0
JB connector pin 1
6 Key common signal KC1
JB connector pin 2
9
@

MAJOR WAVEFORMS

3
4
3 MNI signal
4 APO signal
7
8
7 CE signal for ROM
8 CE signal for working RAM
9 Sound signal (L)
JF connector pin 3
@ Sound signal (R)
JF connector pin 4
Tone : Grand Piano
Volume : Maximum
Touch speed : Maximum
Key : A4
— 11 —
JE connector pin 1
JC connector pin 12
LSI3 LH536PYE pin 12
LSI1 TC55257DFL pin 20