1.9 Power Supply
1 Hardware Overview
Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual
25
1.9 Power Supply
The power supply unit provides many different voltages for the system board and performs the
following functions:
1.
Power input monitor
y
Checks whether the DC power supply (AC adapter) 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 Green or AMBER).
y
Battery indicator (in Green or AMBER).
5.
External interface
y
Performs communication through the I2C bus (via the internal EC/KBC).
y
Transfers the power supply operation mode.
6.
Output monitor
y
Monitors the voltage output to the system block (load/logic circuit side).
y
Monitors the voltage, over voltage, input/output current of the battery pack.
y
Monitors the internal temperature of the battery pack.
y
Monitors the supply voltage from the AC adapter.
Содержание Dynabook Vx/4
Страница 11: ...Chapter 1 Hardware Overview ...
Страница 12: ...1 Hardware Overview ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
Страница 71: ...Chapter 3 Diagnostic Programs ...
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Страница 142: ...Chapter 4 Replacement Procedures 4 1 ...
Страница 143: ...4 Replacement Procedures 4 ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
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Страница 213: ...6000 1 次 Appendices ...
Страница 214: ...Appendices App ii Satellite M40 M45 TECRA A4 dynabook VX 4 Maintenance Manual ...
Страница 217: ...Appendices Satellite M40 M45 TECRA A4 dynabooK VX 4 Maintenance Manual App v ...