Casio CTK-731 - Schematic Diagrams; Main and Sub PCB Schematics

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SCHEMATIC DIAGRAMS
Main PCB JCM465-MA1M
ROM1 ROM2
DSP
D/A Converter
FDD Controller
Backup
Power
RAM2RAM1
CPU
Reset IC
Key Controller
12
11
2
3
5
10
9
6
4
1