Casio SK 8A - Table of Contents

CONTENTS
1. SCHEMATIC DIAGRAM
1-1. Main PCB M3123-MA1M. 1
1-2. Console PCB M3123-CN1M . 2
1-3. LED PCB M3123-LD1M . 3
1-4. Keyboard PCB M3129-KY1M . 4
2. PCB VIEW & MAJOR CHECKPOINTS . 5
3. MAJOR WAVEFORMS. 6
4. BLOCK DIAGRAM. 7
5. KEY & SWITCH MATRIX. 8
6. CPU (MSM6283-05GS) . 9
7. PERCUSSION GENERATOR (MSM6294-02). 11
8. MELODY CIRCUIT.12
9. SAMPLING CIRCUIT.13
10. PERIPHERAL DEVICE ACCESS.14
11. ROM PACK ACCESS . 15
12. LED DRIVE CIRCUIT .16
13. RESET & POWER ON/OFF DETECTION CIRCUITS.17
14. POWER SUPPLY CIRCUIT .. .18
15. TROUBLESHOOTING ..19
PARTS LIST
SK-8.20
SK-8A .27