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1 Hardware Overview
PORTEGE M700/M750 Maintenance Manual (960-661) [CONFIDENTIAL] 1-25
1.8 Power Supply
The power supply supplies many different voltages to the system board and performs the
following functions:
1. Judges that the DC power supply (AC adapter) is connected to the computer.
2. Detects DC output and circuit malfunctions.
3. Controls the battery icon, and DC IN icon.
4. Turns the battery charging system on and off and detects a fully charged battery.
5. Turns the power supply on and off.
6. Provides more accurate detection of a low battery.
7. Calculates the remaining battery capacity.
8. Controls the transmission of the status signal of the main battery.
Table 1-5 and 1-6 lists the power supply output specifications.
Table 1-5 ACPI State and Power line type
ACPI state S0 S3/S4/S5 S3 S4/S5 G3
M state M0
M1 Moff Moff -
Wake On LAN Yes/No
- Yes No Yes No -
P Power line On
Off Off Off Off Off Off
M Power line On *1
Off Off Off Off Off
B Power line On On On On
Off Off Off
LAN-E Power
On
On
On
Off
On
Off
Off
E Power line
On
On
On
On
On
*2
Off
S Power line On On On On On On
Off
RTC Power
On
On
On
On
On
On
On
*1 AMT supported model: On
AMT not supported model: off
*2 Wake up Enable : On
Wake up Disable : Off