Acer Travelmate 7100 Service Guide

							Major Chips Description2-73Table 2-8T62.036.C Pin DescriptionsPin NamePin TypePin No.Descriptionindicate the current drawn from the AC adapter or other power
source such as docking station power supply. This level is 2
Amps per volt nominal. The source impedance is less than 1KW.CHARGSPI14Analog input from the system board to limit the total current
consumed by the system from the AC adapter.  This signal shall
be compared by the module with the CHARGFB from the system
mother board and the battery charger output current adjusted
until CHARGFB does not exceed CHARGSP. The system board
generates CHARGESP in conjunction with a ID resistor
embedded in the LCD cable. The scale is 2 amps per volt. The
source impedance is less than 2KW.
Note:  The battery charger output may be reduced below the
level of CHARGESP by the battery charger current limit signal
CHARGECL.GNDGND15, 16GroundCHRGOUTI17, 18,
19, 20Battery charger current source output at 3.5A max. The output
current is controlled by two control signals which limit the battery
charging current and AC adapter output current. The output
voltage is limited to 13.2V~13.5V.CN2 signalsP12VRO1, 2+12V output, 0~0.5A.GNDGND3, 4, 15,
16GroundP3VRO5, 6, 7, 8+3.3V output, 0~3A.BMCVCCO11, 13+5V output, 0~0.5A.  Used for resuming from suspend-to-
memory mode.P3VRONO12Enables P3VR. Logic level, Active high, +/-luA max loadingP5VRONO14Enables PSVR. Logic level, Active high, +/-luA max loadingP5VRO17, 18,
19, 20+5V output, 0~2.5A. 
						

							2-74Service Guide2.9 Ambit DC-AC Inverter
This notebook uses two kinds of DC-AC inverters: One (T62.088.C) is designed for the 13.3-inch
TFT (LG LP133X1) LCD, the other (T62.055.C) for the 12.1-inch TFT (IBM ITSV50D) LCD.
2.9.1 T62.055C
2.9.1.1 Pin DiagramCN2CN1T62.055.C1
221
203
2
1CN3Figure 2-12T62.055.C Pin Diagram
2.9.1.2 Pin Descriptions
Table 2-9T62.055.C Pin DescriptionsPin NamePin TypePin No.DescriptionsCN1 connector signalsVhi
VloO1
2This is the High voltage side of the Lamp. (The shorter wire to
lamp connects to this output.
Max lamp start voltage(Vrms):1300
Typical lamp run voltage @25°C(Vrms):650
Min open circuit voltage (Vrms):1100
Max open circuit voltage(Vrms):1500CN2 connector signalsGNDGND1, 6This the return signal for the input power and control signals and
is an extension of the system ground.CNTADJO2, 9Contrast adjustment (reserved)DCINI3, 4, 5This is the input DC voltage to supply the operating power.
Max value: 19VDC
Min value: 7 VDCBRTADJO7This is an analog signal in the range of 0 to 3 volts to control the
lamp current.
Vbrite = 1 volt, Lamp current = 50%±10% of Max.
Vbrite = 3volts, Lamp current = Max = 4.5mAPANEL_ONI8A control pin to control on/off lamp.  This input enable the
inverter operation (Lamp On) when high and disables the inverter
when low. This signal is output from a 3.3V CMOS device.
Max loading = 100uA
Logic Low = 0.8 volts Max.
Logic High =1.8 volts Min.PWRLEDO12This signal is an open collector sink signal to drive LED1. The
LED current is limited by a series resistor of 1KW. 
						

							Major Chips Description2-75Table 2-9T62.055.C Pin DescriptionsPin NamePin TypePin No.DescriptionsBATTLEDO13This signal is an open collector sink signal to drive LED2. The
LED current is limited by a series resistor of 1KW.BMCVCCO14This a 5 volt supply for powering the LEDs. It should not be used
for any other purpose.ADVDDO18This is a 5 volt power line for the analog circuits and display
LEDs on the inverter board.AUDGNDGND19, 20This is the return ground for the microphone circuit. It should not
be connected to VGND or other circuit on the inverter board.MIC_OUTO21This is the output of the microphone preamplifier circuit.N.C.-10, 11,
15, 16,
17Non-connected.CN3 connector signalsMIC-CONI1Microphone inputN.C.-2Non-connected.AUDGNDGND3This is the return ground for the microphone circuit. It should not
be connected to VGND or other circuit on the inverter board.2.9.2 T62.088C
2.9.2.1 Pin DiagramFigure 2-13T62.088.C Pin Diagram
2.9.2.2 Pin Descriptions
Table 2-10T62.088.C Pin DescriptionsPin NamePin TypePin No.DescriptionsCN1 connector signalsVOUT1O1Lamp, HVNC2VOUT2O3Lamp, LVCN2 connector signals 
						

							2-76Service GuideTable 2-10T62.088.C Pin DescriptionsPin NamePin TypePin No.DescriptionsADVDDI1This is a 5-volt power line for the analog circuits and display
LEDs on the inverter board.MIC_OUTO2Microphone preamplifier circuit outputAUDGNDI/O3Microphone circuit return groundGNDI/O4, 5System groundSGNDI/O6Signal groundCNTADJ7NCBRTADJI8Lamp current control pin (0~3V)PANEL_ONI9On/Off (On:1.8V(min), Off:0.8V(max))BMCVCCI10This is a 5-volt for powering the LEDs.PWRLEDI/O11Connect to D5 LEDBATTLEDI/O12Connect to D6 LEDDCINI13, 14, 15DC (7~19V)CN3 connector signalsMIC_INI1Microphone circuit inputNC2AUDGNDI/O3Microphone circuit ground 
						

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BIOS Setup InformationBIOS Setup Information3-1The computer BIOS setup utility allows you to configure the computer and its hardware settings.
The computer comes correctly configured, and you do not need to run the BIOS setup utility to use
the computer. However, you might need to use the BIOS utility if you want to customize the way
your computer works, or if you receive an error message after making hardware or software
changes.
With the BIOS setup utility, you can:
· Check the system configuration
· Change the system date, time, or speed
· Add or change the location of the external mouse
· Change the system startup sequence
· Set the power-saving suspend mode
· Set or change resume options
· Set, change, or remove a system password
Press Fn+F2 to access the BIOS setup utility. You will see the BIOS Utility main screen shown
below.
BIOS UtilityAbout My Computer
System Configuration
Power Saving Options
System Security
Reset to Default Settings­¯ = Move Highlight Bar, ¿ = Select, Esc = ExitPress ­ or ¯ to highlight the menu item you want. Then press Enter to access the highlighted item.
Press Esc to exit. 
						

							3-2Service Guide3.1 About My Computer
Selecting About My Computer presents you with two screens of details about the computer and its
peripherals. These screens are for information only; you cannot change the settings on these
screens.  The following table tells you what each of the items on the About My Computer screens
are.
Table 1-1About My Computer ParametersItemDescriptionSystem ArchitectureSystem architecture informationSystem BIOSBIOS versionSystem IDID information on major componentsProcessorProcessor type and speedCoprocessorCoprocessor typeInternal Cache (L1)Internal cache size and whether it is enabled or notExternal Cache (L2)External cache size and whether it is enabled or notTotal MemoryTotal memory sizeBank ABank A memory module size, type and speedBank BBank B memory module size, type and speedSystem PeripheralsGraphics ControllerGraphics controller type and video memory sizeDisplay OutputDisplay type and resolutionHard Drive 0IDE 0 drive type and size (hard disk)Hard Drive 1IDE 1 drive type (CD-ROM or other IDE drives)Floppy Drive AFloppy drive A typeFloppy Drive BFloppy drive B typeExpansion PeripheralsPCMCIA Slot 0Card presence in slot 0 (detected by the socket service)PCMCIA Slot 1Card presence in slot 1 (detected by the socket service)Parallel PortParallel port base address and IRQSerial PortSerial port base address and IRQIrDA (FIR)Infrared port base address and IRQOnboard USBUSB port if enabled or notAC AdapterConnected AC adapter informationMain BatteryInstalled battery type informationOnboard AudioBase AddressAudio base addressMPU Base AddressAudio MPU-401 base addressIRQ SettingAudio IRQ settingsDMA ChannelAudio DMA channels 
						

							BIOS Setup Information3-33.2 System Configuration
Selecting System Configuration presents a Basic System Configuration screen, where you can
change several items in your computer’s configuration.
Press ­ or ¯ to move from one item to another, and ¬ or ® to change settings. Press F1 to get
help on a selected item. Press Esc to exit the Basic System Configuration screen and return to the
main BIOS Utility screen.
3.2.1 Date and Time
The current date is in “Day-of-the-week Month Day, Year” format—for example, [Mon Aug 11,
1997].  The current time is in “Hour:Minutes:Seconds” format. The system uses a 24-hour clock—
for example, 6:25:50 PM appears as 18:25:50.
3.2.2 Floppy Drives
The default setting for Floppy Drive A is 1.44 MB 3.5-inch. Floppy Drive B is set to None, and it is
only enabled if you connect an additional external floppy drive.
3.2.3 Hard Disks
The Hard Disk 0 entry refers to the computer’s internal hard disk. With this entry set to Auto, the
BIOS automatically detects the hard disk and displays its capacity, cylinders, heads, and sectors.
Other hard disk settings are configured automatically for optimum drive performance.
You can change the Hard Disk 0 entry to User if you want to enter drive settings manually. To
determine your drive settings, check the data found on your hard disk or supplied in the hard disk
vendor documentation.Caution:  We suggest that you leave this parameter set to
Auto to allow the BIOS to auto-detect the drive settings at
each boot-up.
The Hard Disk 1 entry is used when a CD-ROM drive module or second IDE drive option is
installed in the module bay.
3.2.4 Num Lock After Boot
When set to Enabled, Num Lock After Boot tells the computer to turn on Num Lock automatically
on startup, activating the keyboard’s embedded numeric keypad. The default setting is Enabled.
3.2.5 LCD Expansion Mode
When set to Enabled, LCD Expansion Mode allows full-screen views in DOS mode. The default
setting is Disabled. 
						

							3-4Service Guide3.2.6 Internal Speaker
This parameter lets you enable or disable the internal speaker. The default setting is Enabled.Tip:  You can also toggle the speaker on and off by pressing
the speaker hot key combination Fn+F7.
3.2.7 Silent Boot
When set to Enabled, the computer shows the computer logo onscreen and hides the POST
routine messages.  The default setting is Enabled.
3.2.8 Fast Boot
When set to Enabled, the computer bypasses the memory tests to speed up the boot-up process.
The default setting is Disabled. 
						

							BIOS Setup Information3-53.3 Advanced System Configuration
For advanced users, the System Configuration menu item contains two hidden pages that allow
you to view and configure more technical aspects of the computer.Caution:  The computer is already tuned for optimum
performance and you should not need to access these
advanced screens. If you do not fully understand the items in
these special screens, do not change their values.
To access the Advanced System Configuration screens, press F8 at the BIOS Utility main screen
before selecting the System Configuration menu item. When you now select System Configuration
and the Basic System Configuration screen appears, you will see “Page 1/3” in its upper right
corner. Press PgDn to access page 2, the first Advanced System Configuration screen, and PgDn
again to access page3, the second Advanced System Configuration screen.Note:  F8 acts as a toggle on the BIOS Utility main screen.
Each time you press F8 at the main screen, you toggle
between accessing the single-screen Basic System
Configuration and the three-screen Advanced System
Configuration.
3.3.1 Internal Cache
Internal cache refers to cache built into the CPU. When enabled, this setting boosts system
performance. It is also called CPU cache or L1 (level one) cache. The default setting is Enabled.
3.3.2 External Cache
External cache greatly increases system performance by lessening the load on main memory. It is
also called L2 (level 2) cache. The default setting is Enabled.
3.3.3 Enhanced IDE Features
The Enhanced IDE Features section includes four parameters for optimizing hard disk
performance. These performance features depend on drive support. Newer drives support most or
all of these features.
· Hard Disk Size > 504MB. If your hard disk size is greater than 504MB and you use DOS or
Windows, set this parameter to DOS/Windows3.x/Win95. If you use NetWare, UNIX, or
Windows NT, set this parameter to Others. The default setting is DOS/Windows3.x/Win95.
· Multiple Sectors Read/Write. This parameter enhances hard disk performance by
reading/writing more data at once. The available values are: Auto or Disabled. The default
Auto setting allows the system to adjust itself to the optimum read/write setting. 
						

							3-6Service Guide· Advanced PIO Mode. Advanced PIO (Programmed Input/Output) Mode enhances drive
performance by optimizing the hard disk timing. The available values are: Auto and Mode 0.
The default setting is Auto.
· Hard Disk 32 Bit Access. This parameter allows your hard disk to use 32-bit access. The
available values are: Auto and Disabled. The default setting is Auto.Tip:  We suggest you set all of these parameters to Auto
whenever that choice is available. This allows the computer
to use the hard drive at the highest possible performance
level.
3.3.4 Onboard Communication Ports
The Onboard Communication Ports section allows you to set addresses and interrupts for the
computer’s serial and parallel ports.
· Serial Port. The Serial Port parameter can be set to Enabled or Disabled.  The Base Address
parameter accepts the following values: 3F8h, 2F8h, 3E8h or 2E8h.  The IRQ parameter
accepts 4 or 3.
The default values are Enabled, 3F8h and 4.
· IrDA (FIR). The IrDA (FIR) parameter can be set to Enabled or Disabled.  The Base Address
parameter accepts the following values: 3F8h, 2F8h, 3E8h or 2E8h.  The IRQ parameter
accepts 4 or 3.  The DMA Channel parameter accepts 3, 0 or 1.
The default values are Enabled, 2F8h, 3 and 3.
· Parallel Port. The Parallel Port parameter can be set to Enabled or Disabled.  The Base
Address parameter accepts 378h or 278h.  The IRQ parameter accepts 7 or 5.  The Operation
Mode parameter accepts the following values:  EPP, ECP, Bi-directional or Standard.  The
ECP DMA Channel parameter lets you set the DMA channel used in ECP mode. You must
choose DMA channel 1 or 3 with this parameter if you select ECP as your parallel port
operation mode.
The default values are Enabled, 378h, 7 and EPP.Caution:  In order to prevent resource conflicts, the BIOS
Utility does not allow you to set the same IRQ and address
values for different devices.
3.3.5 Onboard USB
When enabled, you can connect USB devices to the onboard USB port on the rear of the
computer.  The default setting is Enabled.