Power Supply - Toshiba Portege M100 Maintenance Manual

1.7 Power Supply

1.7

Power Supply

The power supply distributes 27 different voltages to the system board and performs the
following functions:
1. Input port mana gement
AC adaptor connection
Battery pack installation
The voltage of AC adaptor (both IN and OUT)
2. Power supply internal control
Battery pack charging status (ON/OFF)
Controls DC voltage output by the of AC Adaptor
Regulates power supply to system components (load and logic circuits)
Controls circuit breakers in event of a power supply malfunction
3. Management of power to logic circuits
Controls power to the CPU
Regulates power supplied to gate arrays
Controls ON/OFF power
4. Status indicators
DC IN LED
Battery LED
5. External device interface
Monitors I
Transmits the power supply mode.
6. Monitors power output
Power to systems components (load and logic circuits)
Battery pack voltage, overvoltage and I/O current
Battery pack internal temperature
PWRGD from the CPU; 100 signal (power supply healthy)
PORTEGE M100 Maintenance Manual (960-452)
2
C bus connections through EC/KBC on the system board.
1 Hardware Overview
1-15