Prestigio VISCONTE 1300, Техническое и сервисное руководство

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2.3.2 Power Management Mode Definitions
Each system (or model) may have different PM model and state definition. For clear, see the following table:
PM Mode Definitions
Full-On The CPU runs in full speed and all the devices are power on. The system can respond to all
applications with maximum performance.
1.
The system in the state S0.
2. The CPU in the state C0.
3. All the devices in the state D0.
Idle This mode is similar to Full-On except the CPU will change to C1 or C2 state depend on the OS, to
save CPU power consumption.
1.
The system in the state S0.
2. The CPU in the state C1 or C2.
3. All the devices in the state D0.
Suspend The state is more power saving than above, the CPU will change to C3 state and most of power
consumption parts will enter to suspend or idle mode.
1.
The system in the state S3.
2. The CPU in the state C3.
3. HDD, CDROM and LCD enter to suspend mode, otherwise in state D0.
SOFF/STD The state is the most power saving mode, all of the parts in the system will power off, except the
keyboard controller enter to idle mode continuously to control the battery charging and monitor power
button.
Note: Before enter to S4, the OS or BIOS will save all of data or registers in the parts.
1.
The system in the state S5 or S4.
2. The CPU and all of devices power off.
When system in suspend mode (S3 state ), external keyboard/mouse and touch pad can’t be awake up
event source.
2.3.3The backlight control of LCD
The LCD panel is another key part that will consume more power of the notebook system, so there is a way to reduce the
power consumption on battery only, e.i. reduce the brightness of backlight when end-user plug out the AC adaptor.
The backlight is controled through the KBC controller, and it is divided into 5 levels from darkest to brightest. The KBC
bios know the status of power source and the current backlight’s brightness any time. When the AC adaptor plug out, the KBC
will reduce the brightness one or two level automatically.
There is another approach to control the backlight, it will be turn off when LCD cover close(LID
switch), conversly, it will be turn on when LCD cover open
2.3.4CMOS Setup Menu
The setup function only can be invoked by pressing F2 key during POST that provide a approach to change some setting and
configuration the user prefer, and the changed values will save in the battery backup RAM of CMOS RTC and will take effect
after the system rebooted. The setup uses a menu interface to allow the user to configure their system and the features are briefly
listed as follow
Main Setup
Under this menu, you may change time/date and view basic processor and system memory information.
TECHNICAL SERVICE MANUAL Prestigio Visconte 1300
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