1 Hardware Overview
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Satellite A500D Maintenance Manual
1-14
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
Checks whether the AC adapter (DC power supply) 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 White).
Battery indicator (in White or Amber).
DC-IN indicator (in White color)
5.
External interface
Performs communication through the I2C bus (via the internal EC/KBC).
Transfers the power supply operation mode.
Summary of Contents for Satellite Pro A500D series
Page 1: ...Toshiba Personal Computer Satellite Maintenance Manual TOSHIBA CORPORATION CONFIDENTIAL ...
Page 14: ...Chapter 1 Hardware Overview ...
Page 17: ......
Page 35: ...Chapter 2 Troubleshooting Procedures ...
Page 36: ......
Page 143: ...Chapter 4 Replacement Procedures ...
Page 150: ......
Page 252: ...C 22 CONFIDENTIAL SatelliteA500D ProA500D Maintenance Manual 11 USB20_P1_R 12 GND ...
Page 262: ...Figure TI keyboard 4 Korean KO Keyboard Figure KO keyboard 5 United Kingdom UK Keyboard ...
Page 263: ...Figure UK keyboard 6 US International UI Keyboard Figure UI keyboard 7 Hebrew HB Keyboard ...
Page 264: ...Figure HB keyboard 8 Danish DM Keyboard Figure DM keyboard 9 Swiss SW Keyboard ...
Page 265: ...Figure SW keyboard 10 Arabic ARE Keyboard Figure ARE keyboard 11 Czech CZ Keyboard ...
Page 266: ...Figure CZ keyboard 12 Russian RU Keyboard Figure RU keyboard 13 Portuguese PO Keyboard ...
Page 267: ...Figure PO keyboard 14 Slovakian SL Keyboard Figure SL keyboard 15 Italian IT Keyboard ...
Page 268: ...Figure IT keyboard 16 French FR Keyboard Figure FR keyboard 17 German GR Keyboard ...
Page 269: ...Figure GR keyboard 18 Greek GK Keyboard Figure GK keyboard 19 Hungarian HG Keyboard ...
Page 270: ...Figure HG keyboard 20 Spanish SP Keyboard Figure SP keyboard 21 Turkish TR Keyboard ...
Page 271: ...Figure TR d 22 Turkish F TF F Keyboard keyboar Figure TF F keyboard 23 Swedish SD Keyboard ...
Page 272: ...Figure SD keyboard 24 Belgian BE Keyboard Figure BE keyboard 25 Yugoslavian YU Keyboard ...
Page 273: ...Figure YU keyboard 26 Norwegian NW Keyboard Figure NW keyboard 27 Scandinavian ND Keyboard ...
Page 275: ...Figure CB keyboard 30 Romania RO Keyboard Figure RO keyboard 31 Bulgaria BU Keyboard ...
Page 276: ...Figure BU keyboard 32 Japanese JP Keyboard Figure JP eyboard k ...