Power Supply - Toshiba SATELLITE M30-35 Series Maintenance Manual

1.10 Power Supply

1.10 Power Supply
The power supply supplies many different voltages to the system board and performs the
following functions:
1. Checks power input to determine:
•
Whether the AC adaptor is connected to the computer
•
Whether the battery pack is installed and supplying power
2. Checks power supply's internal controls:
•
Battery pack charging: start, stop and voltage supplied to the battery pack
•
Power supply system: Power supplied from a DC power source (AC adaptor)
•
Faulty power supply: Executes forced shutdown if needed
•
Logic: Power supply to various circuits
•
Charging current to PWM control IC for battery pack charging
3. Controls the following aspects of the logic system
•
Power supply to gate arrays
•
Power on/off
4. Indicates the following:
•
DC IN (sets LED to orange or blue)
•
Battery icon (sets LED to orange or blue)
•
Faulty power supply by low battery
5. Interface for the following:
•
BIOS via EC/KBC
•
Function mode of power supply
6. Detects the following:
•
Input voltage to logic system
•
Input voltage, overvoltage and input/output to battery pack
•
Battery pack's internal temperature
•
Input voltage to DC power supply (output from AC adaptor)
The power supply output rating is specified in Table 1-8.
Satellite M30-35 Maintenance Manual (960-455)
1 Hardware Overview
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