Acer Aspire 5520 5220 Series User Manual

Chapter 268
The table below describes the parameters in this screen. Settings in boldface are the default and suggested 
parameter settings.
ParameterDescriptionOption
C State Configuration Enables, disables C2/C3 CPU power states. Auto 
enables C2 and C3 if a single core is detected and 
disables C2+C3 if a dual core is detected.
Auto, Disabled, C2, C3, or C2 + C3
C1E Configuration Enables, disables the C1E power state, which 
applies when a dual core is present. Auto enables 
C1E only if a dual core is...

69Chapter 2
Power Saver
The Power Saver screen displays all power saving options and settings.
ParameterDescriptionOption
LDT Tristate Enables, disables the transition to tristate during an 
LDT stop.
Enabled or Disabled
LDTCLK Clamp Enables, disables the digital clock clamp function.
Enabled or Disabled
LPLL CML Clamp Enables, disables the CML clock clamp function.
Disabled or Enabled
LPLL Active Activates, deactivates, ldtpll CML output.
Always Active or Deactivate
LPFPCI Clock Ratio Sets the LPFPCI...

Chapter 270
Exit
The Exit screen contains parameters that help safeguard and protect your computer from unauthorized use.
The table below describes the parameters in this screen.
ParameterDescription
Exit Saving Changes Exit System Setup and save your changes to CMOS.
Exit Discarding Changes Exit utility without saving setup data to CMOS.
Load Setup Defaults Load default values for all SETUP item.
Discard Changes Load previous values from CMOS for all SETUP items.
Save Changes Save Setup Data to CMOS....

71Chapter 2
BIOS Flash Utility
The BIOS flash memory update is required for the following conditions:
qNew versions of system programs
qNew features or options
qRestore a BIOS when it becomes corrupted. 
Use the Phlash utility to update the system BIOS flash ROM.
NOTE: If you do not have a crisis recovery diskette at hand, then you should create a Crisis Recovery 
Diskette before you use the Phlash utility.
NOTE: Do not install memory-related drivers (XMS, EMS, DPMI) when you use the Phlash.
NOTE: Please...

Chapter 368
This chapter contains step-by-step procedures on how to disassemble the notebook computer for 
maintenance and troubleshooting.
To disassemble the computer, you need the following tools:
qWrist grounding strap and conductive mat for preventing electrostatic discharge
qSmall Philips screw driver
qPhilips screwdriver
qPlastic flat head screw driver
qTw e e z e r s
NOTE: The screws for the different components vary in size. During the disassembly process, group the 
screws with the corresponding...

69Chapter 3
General Information
Before You Begin
Before proceeding with the disassembly procedure, make sure that you do the following:
1.Turn off the power to the system and all peripherals.
2.Unplug the AC adapter and all power and signal cables from the system.
3.Remove the battery pack. 

Chapter 370
Disassembly Procedure Flowchart
The flowchart on the succeeding page gives you a graphic representation on the entire disassembly sequence 
and instructs you on the components that need to be removed during servicing. For example, if you want to 
remove the system board, you must first remove the keyboard, then disassemble the inside assembly frame in 
that order.
Start
Thermal
DoorHDD Door
LCD Module
Middle Cover
HDD Bracket
Keyboard
Battery Pack
F*2 D*5
F*1
B*4
C*2 LCD hinges to logic
D*2...

71Chapter 3
Screw List
ItemDescriptionPart Number
A SCREW M2.5*3(NL) MA000006AG0
B SCREW M2.5*4(NL) MA0000061G0
B SCREW M2.5*6(NL) MA0000062G0
D SCREW M2.5*12(NL) MMCK25120G0
E SCREW M2*2.2 MA000006UG0
F SCREW M2*3(NL) MA0000060G0
G SCREW M2*5(Ni-NL) MA0000012G0
H SCREW M M 3.0D 3.0L K MAAA03032G0
I SCREW M 2.5D 4.15L K 5.5D ZK NL MA0000005G0
J SCREW M 2.5D 3.2L K 6D NI + MA000006C00
K SCREW ICW50_CPU_T HERMAL_SCR AM010000300
L SCREW M M 2.0D 3L K 5D MA0000096G0
M SCREW F 4# 5L K 4.5D ZK NL +...

Chapter 372
Removing the Battery Pack
1.Unlock the battery lock (move the battery lock to the unlock position as shown).
2.Slide the battery release latch then remove the battery.
  

73Chapter 3
Removing the HDD Module/Memory/Wireless LAN Card/Modem Card/System 
Fan/Thermal Modules/VGA Board/CPU/Keyboard and the LCD Module 
Removing the HDD Module
1.Remove the two screws fastening the HDD cover.
2.Detach the HDD cover from the main unit.
3.Pull the tab to remove the HDD module in the direction of the arrow.
Removing the Memory
1.Remove the four screws holding the thermal cover.
2.Detach the thermal cover from the main unit.
3.Pop out the memory from the DIMM socket then remove it (If...