Casio CTK-520L Service Manual

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1 APO signal
MSM6755B-07 pin 39
2 Reset signal
RH5VL40AA pin 1
4 Sound signal (R-ch)
JH connector pin 3
5 Sound signal (L-ch)
JH connector pin 1
6 LED drive signal LX0
MSM6755B-07 pin 88
3 Clock
MSM6755B-07 pin 32
7 LED drive signal LY0
MSM6755B-07 pin 80
Tone: Whistle (59)
Key : A4
Key: D4
MAJOR WAVEFORMS

Casio CTK-520L Specifications

General

Brand	Casio
Model	CTK-520L
Category	Electronic Keyboard
Language	English