Casio HR-100TM - Calculator Features and Settings; Battery and AC Operation Notes; Input Buffer and Reset Function; Selectors and Decimal Modes

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2. DISASSEMBLY
1. Remove the battery cover and the battery.
2. Remove two screws.
Hook positions
3. Remove eight hooks and remove the lower case.
4. Unsolder five lead wires.
Black
Orange
Red
Yellow
White
5. Unsolder the cable.