Acer Travelmate 7300 Service Guide

2-74Service Guide
2.9  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 Diagram
CN2CN1T62.055.C
1
221
20
3
2
1CN3
Figure 2-12 T62.055.C Pin Diagram
2.9.1.2 Pin Descriptions
Table 2-9 T62.055.C Pin Descriptions
Pin NamePin TypePin No.Descriptions
CN1 connector signals
Vhi
VloO1
2This is the High voltage side of the Lamp. (The...

Major Chips Description 2-75
Table 2-9 T62.055.C Pin Descriptions
Pin NamePin TypePin No.Descriptions
BATTLED O 13 This signal is an open collector sink signal to drive LED2. The
LED current is limited by a series resistor of 1KW.
BMCVCC O 14 This a 5 volt supply for powering the LEDs. It should not be used
for any other purpose.
ADVDD O 18 This is a 5 volt power line for the analog circuits and display LEDs
on the inverter board.
AUDGND GND 19, 20 This is the return ground for the microphone circuit. It...

2-76Service Guide
Table 2-10 T62.088.C Pin Descriptions
Pin NamePin TypePin No.Descriptions
ADVDD I 1 This is a 5-volt power line for the analog circuits and display
LEDs on the inverter board.
MIC_OUT O 2 Microphone preamplifier circuit output
AUDGND I/O 3 Microphone circuit return ground
GND I/O 4, 5 System ground
SGND I/O 6 Signal ground
CNTADJ 7 NC
BRTADJ I 8 Lamp current control pin (0~3V)
PANEL_ON I 9 On/Off (On:1.8V(min), Off:0.8V(max))
BMCVCC I 10 This is a 5-volt for powering the LEDs.
PWRLED...

&KDSWHU &KDSWHU
BIOS Setup Information
BIOS Setup Information 3-1
The 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...

3-2Service Guide
3.1  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 1-1 About My Computer Parameters
ItemDescription
System Architecture System architecture information
System BIOS BIOS version
System ID ID information on major components...

BIOS Setup Information 3-3
3.2 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...

3-4Service Guide
3.2.6 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
W hen 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
W hen set to Enabled, the computer bypasses the memory tests to speed up the boot-up process.
The...

BIOS Setup Information 3-5
3.3  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...

3-6Service Guide
· 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...

BIOS Setup Information 3-7
3.4  Power Saving Options
Selecting Power Saving Options on the BIOS Utility main screen presents a screen that allows you
to adjust several power-saving settings.
3.4.1  When Lid is Closed
The computer’s lid switch acts as its power switch: opening the display wakes up the computer,
closing the display puts it to sleep. The W hen Lid is Closed setting determines which suspend mode
the computer enters when the display is closed: Suspend to Disk or Suspend to Memory. The
default...