Toshiba M10 manual Hardware Overview Power Supply

1 Hardware Overview 1.8 Power Supply

1.8Power Supply

The power supply distributes 11 different voltages to the system board and performs the following functions:

1.A/D conversion

The power supply controller (PSC) uses 10-bit sampling for A/D conversion to determine the following values:

•AC adaptor voltage and current

•PR/CDOC voltage and current

•Main and Secondary Batteries voltage, current and temperature

•Output voltage – S3V, 1R5-C1V, 1R8-C1V, PPV, 1R2-P1V, BGVSNS, 2R5SNS-B2V, A5V, 1R25-P1V, E3V, 2R5-B2V

2.AC adaptor and battery check

The PSC checks the following by A/D converted values:

•AC adaptor connected

•PR/CDOC connected

•Battery installed

3.Abnormal check

The PSC determines whether the condition is abnormal, and if so, stores an error code into the error register.

4.Input port management

The PSC monitors the following input signal status:

•System power ON/OFF status

5.Beep and LED control

The PSC makes a beep when the battery is low.

The PSC controls the following two kinds of LED:

DC IN LED (two colors: orange and green)

•Green = indicates AC adaptor is connected

•Orange = indicates an error

Battery LED (two colors: orange and green)

•Green = The battery is fully charged.

•Orange = The computer is quick-charging the battery. / The battery is low.

1-20 Satellite Pro M10 Series Maintenance Manual (960-431)