Casio CTK-220L manual Major Waveforms

Page 8

MAJOR WAVEFORMS

1

3

2

1 APO signal

3 Clock

MSM6755B-13 pin 39

MSM6755B-13 pin 32

2 Reset signal

 

RH5VL40AA pin 1

 

5

4

6

4 Sound signal

5 LED drive signal LX0

JH connector pin 2

MSM6755B-13 pin 88

 

6 LED drive signal LY1

 

MSM6755B-13 pin 81

Tone: Whistle (59)

Key: D4

Key : A4

 

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Contents CTK-220L Contents Specifications GeneralBlock Diagram CPU LSI1Circuit Description KEY MatrixCPU LSI1 MSM6755B-13 Filter Block Major Waveforms Printed Circuit Boards Sub PCB KDM445-MA2MSchematic Diagrams Sub PCBs KDM445-MA2M/MA3M Keyboard PCBs KDM4910K-KY1M/KY2M LED PCB KDM446-LD1M LED PCB KDM445-LD2M LED PCB KDM446-LD3M Exploded View Parts List Keyboard PCBs Nov MA1100761A