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CONTENTS

1. SCHEMATIC DIAGRAM

1-1. MAIN PCB..................................................................................................................1

1-2. KEY MATRIX 1 ..........................................................................................................2

1-3. KEY MATRIX 2 ..........................................................................................................3

2. SPECIFICATIONS ............................................................................................................5

3. REPLACING THE BATTERIES ........................................................................................6

4. RESETTING THE UNIT ....................................................................................................7

5. SAVING DATA ..................................................................................................................8

6. LSI PIN FUNCTIONS

6-1. CPU:LSI1 .................................................................................................................12

6-2. VOLTAGE REGULATOR:REG1 (S-81253) ............................................................13

6-3. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ........................................................13

7. TROUBLESHOOTING ....................................................................................................14

8. DIAGNOSTICS................................................................................................................17

9. ASSEMBLY VIEW ..........................................................................................................23

10. PARTS LIST....................................................................................................................25

Casio SF-5500B Service Manual & Parts List

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