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 plug the AC
adapter into the notebook and an electrical outlet.  The adapter has three charging modes:
· Rapid mode
The notebook uses rapid charging when power is turned off and a powered AC adapter is
connected to it.  In rapid mode, a fully depleted battery gets fully charged in approximately two
hours.
· Charge-in-use mode
When the notebook is in use with the AC adapter plugged in, the notebook also charges the
battery pack if installed.  This mode will take longer to fully charge a battery than rapid mode.
In charge-in-use mode, a fully depleted battery gets fully charged in approximately six to eight
hours.
· Trickle mode
The adapter charges the battery pack for two hours using trickle current 380mA, then shifts to
1/10 duty pulse trickle charge to keep the battery capacity at 100%. 
						

							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 (charge while system is not operative, A)2.0 (typ.)Charging ProtectionMaximum temperature protection (ºC)60Maximum voltage protection (V)
16.7V±0.2VOver voltage protection
13V±0.151.4.22 DC-DC Converter
DC-DC converter generates multiple DC voltage level for whole system unit use.
Table 1-26DC-DC Converter SpecificationsItemSpecificationVendor & model nameAmbit T62.041.C.00Input voltage (Vdc)8~21Output Rating5V3.3V2.9V(2.9 /3.1 /3.3V)+12V+6V5VSBCurrent (w/ load, A)0~3.20~3.30~4.20~0.150~0.10.005Voltage ripple (max., mV)50505010030075Voltage noise (max., mV)100100100200500250OVP (Over Voltage Protection, V)6.1~8.04.2~6.23.3-5.2 V--- 
						

							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 frequency (kHz)40 (min.)-65 (max.)Output current (mArms)1.0~5.5 (min.)1.5~6.1 (typ.)2.0~6.7 (max.)1.4.24 LCD
Table 1-28LCD SpecificationsItemSpecificationVendor & model nameHITACHI
LMG9980ZWCC-01TORiSAN
LM-JK53-22NFR-AHITACHI
TX31D21VCMechanical SpecificationsLCD display area
(diagonal, inch)12.112.112.1Display technologySTNSTNTFTResolutionSVGA (800x600)VGA (800x600)SVGA (800x600)Supported colors----262,144 colorsOptical SpecificationContrast ratio35 (typ.)40 (typ.)80 (typ.)Brightness (cd/m2
)70 (typ.)70 (typ.)70 (typ.)Brightness controlkeyboard hotkeykeyboard hotkeykeyboard hotkeyContrast controlusing keyboard
hotkeyusing keyboard
hotkeynoneElectrical SpecificationSupply voltage for LCD
display (V)3.3 or 5 (typ.)3.3 or 5 (typ.)3.0 ~ 3.6 (typ.)Supply voltage for LCD
backlight (Vrms)650 (typ.)630 (typ.)595(typ.), 660(max) 
						

							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
measured at maximum load under 115V(60Hz).Output Ratings (CV mode)DC output voltage (V)+19.0V~20.5VNoise + Ripple (mV)300mvp-pmax (20Mhz bandwidth)Load (A)0 (min.)2.4 (max.)Output Ratings (CC mode)DC output voltage (V)+12 ~+19Constant output (A)2.75 ± 0.2Dynamic Output CharacteristicsTurn-on delay time (s, @115Vac)2Hold up time (ms; @115 Vac input, full load)5 (min.)Over Voltage Protection (OVP, V)26Short circuit protectionOutput can be shorted without damageElectrostatic discharge (ESD, kV)±15 (at air discharge)Dielectric Withstand VoltagePrimary to secondary3000 Vac (or 4242 Vdc), 10 mA for 1 secondLeakage current0.25 mA maximum @ 254 Vac, 60Hz.Regulatory RequirementsInternal filter meets:
1.  FCC class B requirements. (USA)
2.  VDE 243/1991 class B requirements. (German)
3.  CISPR 22 Class B requirements. (Scandinavia)
4.  VCCI class II requirements. (Japan) 
						

							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 screen.Fn-F2Brightness ControlContrast ControlToggles between brightness control and contrast control.
Press the scale hotkeys (Fn- ®and Fn
 -¬) to increase and
decrease the brightness or contrast level.
Notebooks with TFT displays do not show the brightness
control icon.Fn-F3Display ToggleSwitches display from LCD to CRT to both LCD and CRT.Fn-F4Battery GaugeDisplays the battery gauge.Fn-F5Volume ControlPress the scale hotkeys (Fn-® and Fn-¬) to increase and
decrease the output level.Fn-F6SetupGains access to BIOS Setup’s Advanced System
Configuration parameters.Fn-F7Hibernation/Standb
yEnters hibernation mode if the 0-volt suspend function is
installed and enabled; otherwise, the notebook enters standby
mode.Fn-®Scale IncreaseIncreases the setting of the current icon.Fn-¬Scale DecreaseDecreases the setting of the current icon.Fn-TToggle TouchpadTurns the internal touchpad on and off.When the available hotkey is toggled, the system will issue a beep to enter the
assigned process. 
						

							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, peripherals connected to the serial and parallel ports, and video memory.  If no activity is
detected for a period of time (called an inactivity time-out), the computer stops some or all of these
devices in order to conserve energy.
This computer employs an innovative power management technique called Heuristic Power
Management or HPM.  HPM allows the computer to provide maximum power conservation and
maximum performance at the same time.
Power management methods used by most computers are timer-based.  You set inactivity time-out
values for the display, hard disk, and other devices.  The computer then sleeps when these time-
outs elapse.  The problem with this is that no two users are alike.  Each of us has his or her own
habits when using the computer, which makes timer-based power management ineffective.
With HPM, your computer manages its power according to the way you use your computer.  This
means the computer delivers maximum power when you need it, and saves power when you don’t
need the maximum — all without your intervention.  There are no timers to set, because the HPM
system figures out everything for you.
HDD Standby Timer Time Out
Idle of HDDPower OffDisplay Screen OffNormal ModeHibernation ModeStandby ModeStandby ModeHDD Standby Mode
(HDD Motor Off)Light Green ModeLight Green ModeCheck password if neededPower Switch Off More than 3 SecondsCover Door Close
Power Switch On
K/B, PS/2 Mouse Pressed
Standby EventSystem Active
Power Switch (Beep)
Standby Wakeup 
Cover Door ClosePower Switch (Beep)
Cover Door Open Power Switch Event  Display Standby 
Timer Time Out
Hibernation
 Event
HDD Acess
Figure 1-11Power Management Block Diagram 
						

							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 Management Mode must be set to [ENABLED].
· System Sleep State must be set to [STANDBY].
In this situation, the following are ways to enter standby mode:
· Pressing the sleep hot key Fn-F7
· If the waiting time determined by the computer’s HPM unit elapses without any
system activity.
· Closing the display cover.
· With the System Sleep State is set to [HIBERNATION], the computer also enters
standby mode if the hibernation file (Sleep Manager) is invalid or not present.
· “Hard Disk Drive” is [Disabled] in System Security of BIOS SETUP.
· “Hard Disk 0” is [None] in Basic System Configuration of BIOS SETUP.
Note:   If the computer detects a PC I/O card installed in the PC card slots, the computer
sleeps (light green mode) to maintain your communications connection.  It will not enter
standby mode.The condition
of Standby
Mode· Issue a beep.
· Light standby LED with 1 Hz frequency.
· Disable the mouse, serial and the parallel port.
· The keyboard controller, HDD and VGA enter the standby mode.
· Stop the CPU internal clock.
· All the functions are disabled except the keyboard, battery low warning and modem
ring wake up from standby (if enabled).The condition
back to On
ModeAny one of following activities will let system back to Normal Mode:
· Any keystroke (Internal KB or External KB)
· Any active pointing device (internal or external, PS/2 or serial or USB)
· Resume Timer matched
· Opening the display cover if you closed the display cover to enter Standby mode.
· Modem ring 
						

							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 standbyThe condition back to
On ModeAny one of following activities will let system back to Normal Mode:
· Any keystroke (Internal KB or External KB)
· Modem ring.HIBERNATION MODEIn hibernation mode, all power shuts off (the computer does not consume any power).  The
computer saves all system information onto the hard disk before it enters hibernation mode.  Once
you turn on the power, the computer restores this information and resumes where you left off upon
leaving hibernation mode.If the computer beeps but does not enter hibernation mode after pressing the sleep
hot key, it means the operating system will not allow the computer to enter the
power saving mode.Do not change any devices (such as add memory or swap hard disks when the
computer is in hibernation mode.If the computer detects a PC I/O card installed in the PC card slots, the computer
enters light green mode to maintain your communications connection.  It will not
enter standby nor hibernation mode. 
						

							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 Disk Drive” is not [Disabled] in System Security of BIOS SETUP.
· “Hard Disk 0” is not [None] in Basic System Configuration of BIOS SETUP.
· If the waiting time determined by the computer’s HPM unit elapses without any
system activity.
· If a battery low condition takes place, the computer enters hibernation mode in
about three minutes.  The Sleep Upon Battery-low parameter in Setup must be
set to [ENABLED].
· Invoked by the operating system power saving modesThe condition of
Hibernation Mode· Except the RTC, KB controller and power switch, all the system components are
off.The condition back
to On Mode· Pressing the power switch.
· Resume Timer matchedDISPLAY STANDBY MODEScreen activity is determined by the keyboard, the built-in touchpad, and an external PS/2 pointing
device.  If these devices are idle for the period determined by the computer’s HPM unit, the display
shuts off until you press a key or move the touchpad or external mouse.
Table 1-34Display Standby Mode Conditions and DescriptionsConditionDescriptionThe condition to enter
Display Standby Mode· Pointing device is idle until Display Standby Timer times-out or LCD cover
is closed.The condition of
Display Standby Mode· All the system components are on except LCD backlight and CRT
horizontal frequency output (if CRT is connected)The condition back to
On Mode· Any keystroke (Internal KB or External KB)
· Pointing device activityThe VGA BIOS should support DPMS (Desktop Power Management System) for
the standby and hibernation mode function call. When the Display Standby Timer
expires, the system BIOS will execute the DPMS service routines. 
						

							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 condition of HDD Standby ModeAll the system components are on except HDD spindle
motorThe condition back to On ModeAny access to HDDBATTERY LOWWhen the battery capacity is low and no adapter is plugged in, the system will generate the
following battery low warning:
· Flash power LED with 1 Hz.
· Issue 4 short beeps per minute (if enabled in setup).
· If the AC adapter does not plug in within 3 minutes and the “Standby/Hibernation upon
Battery-low” in BIOS SETUP is enabled, the system will enter Standby/0-Volt Hibernation
Mode.  The battery low warning will stop as soon as the AC adapter is plugged into the
system.
THE AUTODIM PROCESS OF THE LCD BRIGHTNESSThe notebook has a unique “automatic dim” power saving feature.  When the notebook is using
AC power and you disconnect the AC adapter from the notebook, the system “decides” whether or
not to automatically dim the LCD backlight to save power.
If the LCD backlight is too bright, the system automatically adjusts it to a manageable level;
otherwise, the level stays the same.  If you want a brighter picture, you can then adjust the
brightness and contrast level using hotkeys (Fn-F2).
If you reconnect AC power to the system, the system automatically adjusts the LCD backlight to its
original level — the brightness and contrast level before disconnecting the AC adapter.  If you
adjusted the brightness and contrast level after disconnecting AC power, the level stays the same
after you reconnect the AC adapter.
There are two reasons for the notebook to have the LCD AutoDim feature. The first is to save the
power during the notebook is operating under the DC mode.  The second is to save the “favorite”
brightness parameter set by the user.