Acer Extensa 390 Service Guide

System Introduction1-19 1.4.20 Battery
Table 1-24Battery SpecificationsItemSpecificationBattery gauge on screenYes, by hotkeyYes, by hotkeyVendor & model nameToshiba BTP-031Sony BTP-T31Battery typeNiMHLi-IonCell capacity (mAH)35001400Cell voltage (V)1.23.6Number of battery cell9-cell9-CellPackage configuration9 serial3 serial, 3 parallelPackage voltage (V)10.810.8Package capacity (WAH)35004200Second batteryNoNo1.4.21 Charger
To charge the battery, place the battery pack inside the battery compartment and...

1-20Service GuideTable 1-25Charger SpecificationsItemSpecificationVendor & model nameAmbit T62.069.C.00Input voltage (from adapter, V)0-24VOutput current (to DC/DC converter, A)3 (max.)Battery Low VoltageBattery Low 1 level (V)10.16 (typ., for NiMH)
8.566 (typ., for LIB)Battery Low 2 level (V)10.279 (typ., for NiMH)
8.185 (typ., for LIB)Battery Low 3 level (V)9.137 (typ., for NiMH)
7.709 (typ., for LIB)Charge CurrentBackground charge (charge even system is still operative, A)0.8 (typ.)Normal charge...

System Introduction1-21 1.4.23 DC-AC Inverter
DC-AC inverter is used to generate very high AC voltage, then supply to LCD CCFT backlight use,
and is also responsible for the control of LCD brightness.  Avoid touching the DC-AC inverter area
while the system unit is turned on.
Table 1-27DC-AC Inverter SpecificationsItemSpecificationVendor & model nameAmbit T62.071.C.00Input voltage (V)6.8(in.)-22(max.)Input current (mA)--750 (max.)Output voltage (Vrms, no load)1000 (min.)-1600 (max.)Output voltage...

1-22Service Guide1.4.25 AC Adapter
Table 1-29AC Adapter SpecificationsItemSpecificationVendor & model nameDelta ADP-45GB Rev. E3, E5Input RequirementsNominal voltages (Vrms)90 - 264Nominal frequency (Hz)47 - 63Frequency variation range (Hz)47 - 63Maximum input current (A, @90Vac, full load)1.5 AInrush currentThe maximum inrush current will be less than 50A and
100A  when the adapter is connected to 115Vac(60Hz)
and 230Vac(50Hz) respectively.EfficiencyIt should provide an efficiency of 83% minimum, when...

System Introduction1-23 1.5 Software Configuration and Specification
1.5.1 BIOS
The BIOS is compliant to PCI v2.1, APM v1.2, E-IDE and PnP specification.  It also defines the
hotkey functions and controls the system power-saving flow.
1.5.1.1 Keyboard Hotkey Definition
The notebook supports the following hotkeys.
Table 1-30Hotkey DescriptionsHotkeyIconFunctionDescriptionFn-EscHotkey EscapeExits the hotkey control.Fn-F1
?Hotkey Help
Displays the hotkey list and help.  Press | to exit the...

1-24Service Guide1.5.1.2 MultiBoot
The system can boot from the FDD, External FDD, HDD, CD-ROM.  The user can select the
desired booting process to boot the system.  If the CD-ROM is bootable, the BIOS will override the
other process to boot the system directly.
1.5.1.3 Power Management
This computer has a built-in power management unit that monitors system activity.  System activity
refers to any activity involving one or more of the following devices: keyboard, mouse, floppy drive,
hard disk,...

System Introduction1-25 ON MODENormal full-on operation
STANDBY MODEThe computer consumes very low power in standby mode.  Data remain intact in the system
memory until battery is drained.Warning: Unstored data is lost when you turn off the computer power in standby
mode or when the battery is drained.
Table 1-31Standby Mode Conditions and DescriptionsConditionDescriptionThe condition
to enter
Standby ModeThere are two necessary conditions for the computer to enter standby mode:
· Heuristic Power...

1-26Service GuideLIGHT GREEN MODEThe notebook consumes very low power in light green mode.  Data and I/O connections remain
intact in the system memory until battery is drained.
Table 1-32Light Green Mode Conditions and DescriptionsConditionDescriptionThe condition to enter
Light Green Mode· PCMCIA I/O Card detected and occupy resources (Non Cardbus mode).
· HPM timer times out or cover close or APM standby / suspend function calls.The condition of Light
Green Mode· Issue a beep.
· Only HDD, VGA enter...

System Introduction1-27 Table 1-33Hibernation Mode Conditions and DescriptionsConditionDescriptionThe condition to
enter Hibernation
ModeThere are two necessary conditions for the computer to enter standby mode:
· Heuristic Power Management Mode must be set to [ENABLED].
· System Sleep State must be set to [HIBERNATION].
· The hibernation file created by Sleep Manager must be present and valid.
In this situation, the following are ways to enter hibernation mode:
· Pressing the sleep hot key Fn-F7
· “Hard...

1-28Service GuideHARD DISK STANDBY MODEThe hard disk enters standby mode when there are no disk read/write operations within the period
of time determined by the computer’s HPM unit.  In this state, the power supplied to the hard disk is
reduced to a minimum.  The hard disk returns to normal once the computer accesses it.
Table 1-35Hard Disk Standby Mode Conditions and DescriptionsConditionDescriptionThe condition to enter HDD Standby
ModeDisplay Standby HPM timer times-out or LCD cover is
closed.The...