Toshiba Portege M100 Maintenance Manual - Page 30
Power Supply, Hardware Overview
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1.7 Power Supply 1 Hardware Overview 1.7 Power Supply The power supply distributes 27 different voltages to the system board and performs the following functions: 1. Input port mana gement • AC adaptor connection • Battery pack installation • The voltage of AC adaptor (both IN and OUT) 2. Power supply internal control • Battery pack charging status (ON/OFF) • Controls DC voltage output by the of AC Adaptor • Regulates power supply to system components (load and logic circuits) • Controls circuit breakers in event of a power supply malfunction 3. Management of power to logic circuits • Controls power to the CPU • Regulates power supplied to gate arrays • Controls ON/OFF power 4. Status indicators • DC IN LED • Battery LED 5. External device interface • Monitors I2C bus connections through EC/KBC on the system board. • Transmits the power supply mode. 6. Monitors power output • Power to systems components (load and logic circuits) • Battery pack voltage, overvoltage and I/O current • Battery pack internal temperature • PWRGD from the CPU; 100 signal (power supply healthy) PORTEGE M100 Maintenance Manual (960 -452) 1-15