Acer Travelmate 6492 Service Guide

Chapter 141
SYSTEM POWER PLANES
1. VL/5VPCU/3VPCU: These power planes will always be turned on unless the AC adapter and battery pack is 
removed from the system. 5VPCU is the power source of +5V and 5V_S5 and 3VPCU is the power source of 
+3V, 3VSUS and 3V_S5.
2. VCCRTC: This power plane will always be turned on even when the AC adapter and battery pack is removed 
form the system. This battery backed up power is used by the RTC module inside the SB460.
3. 1.8V_S5/3V_S5/5V_S5: These power plane are used...

42Chapter 1
Keyboard controller
Part name: iTE IT8152
Package: QFP 128-pin
Features: 
•8032 Embedded Controller
•LPC Bus Interface
•PS/2 interface for touchpad
•Flash Interface
•SM Bus Controller
•System Wake Up Control / Ec Wake Up Control
•Interrupt Controller
•ACPI PowerManagement Channel
•PWM With Smart Auto Fan Control
Supply current: Standby With Sleep Mode Current: 100uA
Speaker
Model: YYD2112G
Impedance: 4 Ohm ± 15% on 2100Hz
Rated input: 2 W
Lowest resonance frequency: 850Hz ± 20%
Output sound...

Chapter 143
Mechanical off is a condition where all power except the RTC battery has been removed from the system.
1. Initial to On state: When the AC adapter or Battery pack has been plugged into the system, the PC97551 will 
be reset and initial all output pins then the system goes into Initial state and waiting for power on event. If the 
power button is pressed then the system will go into the ON state.
2. ON to Standby state: The system will go into the Standby state when 963L receives the POS...

44Chapter 1
DC-AC inverter
ZR3 provides backlight adjustable DC-AC inverter. Dimension T.B.D mm
AC adapter
Part name: TBD
Input characteristics: 90Watt15V Current 0-100mA 11.4 12 12.6 V
Output Current 5V 0 3 A
Output Current 3.3V 0 3 A
Output Current 15V 0 100 mA
Input Voltages 19V 8 20 V
Semtech G913-C PWM chip:2.5V
PARAMETERCONDITIONSMINTYPMAXUNITS
Output Current 2.5V 0 7 A
Input HighVoltages 1.8 25 V
Intersil MAX8774 PWM chip: CPU VCORE (0.8V ~ 1.55V for different frequency of CPU)...

Chapter 145
Battery
Main battery:
RTC battery:
Part name: J11EAGLE 
Capacity: 14mAH
Voltage: 3.0V
SpecificationLiIon 
Parts name 3UR18650Y-2-QC-ZR1
Dimension (CELL) 202(L)x 67(W)x23.7(H)
Normal capacity 38000mA
Normal voltage 11.1V
Charge voltage 12.60V±0.09V 

46Chapter 1 

Chapter 247
BIOS Setup Utility
The BIOS Setup Utility is a hardware configuration program built into your computer’s BIOS (Basic Input/Output 
System).
Your computer is already properly configured and optimized, and you do not need to run this utility. However, if you 
encounter configuration problems, you may need to run Setup. Please also refer to Chapter 4 Troubleshooting 
when problem arises.
To activate the BIOS Utility, press 
m during POST (when “Press  to enter Setup” message is prompted on 
the...

48            Chapter 2
qTo choose a menu, use the cursor left/right keys (zx).
qTo choose a parameter, use the cursor up/down keys (wy).
qTo change the value of a parameter, press p or q.
qA plus sign (+) indicates the item has sub-items. Press e to expand this item.
qPress ^ while you are in any of the menu options to go to the Exit menu.
qIn any menu, you can load default settings by pressing t. You can also press u to save any changes made 
and exit the BIOS Setup Utility.
Note: You can change the...

Chapter 249
Main
The Main screen displays a summary of your computer hardware information, and also includes basic setup 
parameters. It allows the user to specify standard IBM PC AT system parameters.
Note: The screen below is for reference only. Actual values may differ. IDE1 Model Name This field displays the model name of devices installed on secondary IDE 
master. The hard disk drive or optical drive model name is automatically 
detected by the system
IDE1 Serial Number This field shows the serial...

50            Chapter 2
The table below describes the parameters in this screen. Settings in boldface are the default and suggested 
parameter settings.
Note: The sub-items under each device will not be shown if the device control is set to disable or auto. This is 
because the user is not allowed to control the settings in these cases.
ParameterDescriptionFormat/Option
System Time Sets the system time. The hours are 
displayed with 24-hour formatFormat: HH:MM:SS 
(hour:minute:second)
System Date Sets...