with JACK : OPEN "OFF" detection with out JACK : GND Short circuit
Battery voltage BATT.-DET detection
7-7. MAIN BATTERY CIRCUIT SECTION BLOCK DIAGRAM
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VBATT=0 Charging off Vcc Lithium ion battery Current Voltage circuit section section LED_R Completion : Green light up CHG SW When the battery is installed , its turned "ON". RESET CHARGE-ON_L VCR-H Charge control IC System microcomputer LED_G