Toshiba Satellite A350 Maintenance Manual - Page 31
Power Supply, Turns on the Power LED in White.
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1 Hardware Overview Error! Style not defined. Error! Style not defined. 1.4 Power Supply The power supply unit provides constant voltage 19V for the system board and performs the following functions: 1. Power input monitor y Checks whether the AC adapter (DC power supply) is connected to the computer. y Checks whether the battery pack is connected to the computer. y Monitors the DC power supply input voltage (AC Adapter output voltage). 2. Power supply's internal control y Turns on and off the battery pack charging power supply. y Issues a charging current instruction to the PWM control IC of the battery pack charging power supply. y Controls the supply of DC power supply input (AC Adapter output) to the power supply unit. y Controls the supply of power to the system block (load/logic circuit side). y Controls forced shutdown if the power supply malfunctions. 3. Logic circuit control y Instructs the gate array to enable/disable tuning the power on. y Controls power-on/off operation. 4. Status display y Turns on the Power LED (in White). y Battery indicator (in White or AMBER). y DC-IN indicator (in White color) 5. External interface y Performs communication through the I2C bus (via the internal EC/KBC). y Transfers the power supply operation mode. Satellite A350 Maintenance Manual 1-14