Toshiba Satellite A100 Maintenance Manual - Page 37
Power Supply, Battery indicator in Blue or Green or AMBER or AMBER Flash.
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1.7 Power Supply 1 Hardware Overview 1.7 Power Supply The power supply unit provides many different voltages for the system board and performs the following functions: 1. Power input monitor ? Checks whether the DC power supply (AC adapter) is connected to the computer. ?Checks whether the battery pack is connected to the computer. ? Monitors the DC power supply input voltage (AC Adapter output voltage). 2. Power supply's internal control ? Turns on and off the battery pack charging power supply. ? Issues a charging current instruction to the PWM control IC of the battery pack charging power supply. ? Controls the supply of DC power supply input (AC Adapter output) to the power supply unit. ? Controls the supply of power to the system block (load/logic circuit side). ? Controls forced shutdown if the power supply malfunctions. 3. Logic circuit control ? Instructs the gate array to enable/disable tuning the power on. ?Controls power-on/off operation. 4. Status display ? Turns on the Power LED (in Blue or Green or AMBER). ? Battery indicator (in Blue or Green or AMBER or AMBER Flash). 5. External interface ? Performs communication through the I2C bus (via the internal EC/KBC). ? Transfers the power supply operation mode. 6. Output monitor ? Monitors the voltage output to the system block (load/logic circuit side). ?Monitors the voltage, over voltage, input/output current of the battery pack. ? Monitors the internal temperature of the battery pack. ? Monitors the supply voltage from the AC adapter. Satellite A100/A105 / TECRA A7 Maintenance Manual 19