1 Hardware Overview
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Satellite L550 Maintenance Manual
1-12
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 Green).
Battery indicator (in Green or Amber).
DC-IN indicator (in Green)
5. External interface
Performs communication through the I2C bus (via the internal EC/KBC).
Transfers the power supply operation mode.
Содержание Satellite L550 series
Страница 1: ...Toshiba Personal Computer Satellite Maintenance Manual TOSHIBA CORPORATION ...
Страница 13: ...Chapter 1 Hardware Overview ...
Страница 16: ......
Страница 32: ...Chapter 2 Troubleshooting Procedures 2 ...
Страница 33: ......
Страница 100: ...3 Tests and Diagnostics Satellite L550 ProL550 Series Maintenance Manual Series T D 13 ...
Страница 121: ...3 Tests and Diagnostics Satellite L550 Satellite L555 Satellite L557 Satellite ProL550 Series T D 34 ...
Страница 122: ...Chapter 4 Replacement Procedures ...
Страница 192: ...B 2 Liverpool 10M 10MG Maintenance Manual B 2 System Board Bottom View Figure B 2 System Board Layout Bottom ...
Страница 223: ...SatelliteL550 ProL550 Series Maintenance Manual E 2 3 Thai TI Keyboard 4 Korean KO Keyboard ...
Страница 224: ...SatelliteL550 ProL550 Series Maintenance Manual E 3 5 United Kingdom UK Keyboard 6 US International UI Keyboard ...
Страница 225: ...SatelliteL550 ProL550 Series Maintenance Manual E 4 7 Hebrew HB Keyboard ...
Страница 226: ...SatelliteL550 ProL550 Series Maintenance Manual E 5 8 Danish DM Keyboard 9 Swiss SW Keyboard ...
Страница 227: ...SatelliteL550 ProL550 Series Maintenance Manual E 6 10 Arabic ARE Keyboard 11 Czech CZ Keyboard ...
Страница 228: ...SatelliteL550 ProL550 Series Maintenance Manual E 7 12 Russian RU Keyboard 13 Portuguese PO Keyboard ...
Страница 229: ...SatelliteL550 ProL550 Series Maintenance Manual E 8 14 Slovakian SL Keyboard 15 Italian IT Keyboard ...
Страница 230: ...SatelliteL550 ProL550 Series Maintenance Manual E 9 16 French FR Keyboard 17 German GR Keyboard ...
Страница 231: ...SatelliteL550 ProL550 Series Maintenance Manual E 10 18 Greek GK Keyboard 19 Hungarian HG Keyboard ...
Страница 232: ...SatelliteL550 ProL550 Series Maintenance Manual E 11 20 Spanish SP Keyboard 21 Turkish TR Keyboard ...
Страница 233: ...SatelliteL550 ProL550 Series Maintenance Manual E 12 22 Turkish F TR F Keyboard 23 Swedish SD Keyboard ...
Страница 234: ...SatelliteL550 ProL550 Series Maintenance Manual E 13 24 Belgian BE Keyboard 25 Yugoslavian YU Keyboard ...
Страница 235: ...SatelliteL550 ProL550 Series Maintenance Manual E 14 26 Norwegian NW Keyboard 27 Scandinavian ND Keyboard ...
Страница 237: ...SatelliteL550 ProL550 Series Maintenance Manual E 16 30 Japanese JP Keyboard ...