Casio SF-5500B - Getting Started; Read this first!; Make back up copies of important data!

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1. SCHEMATIC DIAGRAM
1-1. MAIN PCB
Note: There are two kind of PCBs.
Refer to the following matrix.
TYPE LSI3 C14 R3 R4 R11
A OOO—O
B———O—
O: Mounted
—: Not mounted.