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Acer 521 manual Model Definition and Configuration, Appendix a

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Specifications System Block Diagram Bluetooth Password Euro symbol Indicators Wireless LAN Warranty Dimension Common Problems

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Appendix A

Model Definition and Configuration

Appendix A

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Page 148 Page 150

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Acer 521 manual Model Definition and Configuration, Appendix a

Page 148 Page 150

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Contents

Aspire one 521 Series Service Guide Revision History Copyright Conventions Preface Page Table of Contents 111 AO521 Table of Contents Chapter Features Audio subsystem Storage subsystemOptical Media Drive Communication Power Adapter and Battery Dimensions and WeightAccessories Special Keys and Controls Environment Warranty AMD ASB2 CPU System Block Diagram Icon Description Top View Left View Closed Front View Right View Icon Function Description IndicatorsBase View Function Left Button Right Button Main TouchPad TouchPad Basics Desired access Num Lock on Num Lock off Using the KeyboardLock Keys and embedded numeric keypad Lock key Description Key Description Windows Keys Hotkey Icon Function Description Hot Keys US dollar sign Euro symbolSpecial Keys Processor Specification Hardware Specifications and ConfigurationsProcessor Specifications North Bridge Chipset Specification Setup of 2D polygons and lines Item NB Specification Item NB Specification Normal operation Item NB Specification Southbridge Chipset Specification Item SB Specification USB System Memory Specification LCD Specification Hard Disk Drive Interface Specification Lvds Bluetooth Specification LAN Interface Specification Audio Codec and Amplifier SpecificationKeyboard Specification Media Card Reader Specification Battery Specification Cell Wireless LAN Specification Interface Specifications Navigating the Bios Utility Bios Setup Utility Parameter Description Information Parameter Description Format/Option Main Disabled or Setting a PasswordSecurity Parameter Description Option Removing a Password Enter New Password Continue Changing a Password Information Main Security Boot Exit Boot Exit Exit Saving Changes Exit Bios Flash Utility DOS Flash Utility Page WinFlash Utility Select Enter Unlock Password and press Enter Remove HDD/BIOS Password UtilitiesRemove HDD Password Removing Bios Passwords Miscellaneous Utilities Using Boot Sequence SelectorUsing DMITools Example 1 Read DMI Information from Memory Using the LAN MAC Utility Related Information Disassembly RequirementsReplacement Requirements Pre-disassembly Instructions Main Screw List Quantity Acer Part Number Disassembly Process Screw List Step Quantity External Module Disassembly ProcessExternal Modules Disassembly Flowchart Removing the Battery Pack Removing the Dummy Card Step Screw Quantity Screw Type Removing the Base Door Removing the Dimm Module Removing the Hard Disk Drive Module Chapter Step Screw Quantity Screw Type Removing the Wlan Module Pull the Wlan module out and away Chapter Removing the 3G Module Step Screw Quantity Screw Type 3G Module Disassembly Pull the 3Gmodule out and away Chapter Main Unit Disassembly Flowchart Main Unit Disassembly Process Step Screw Quantity Removing the Keyboard Page Removing the Upper Cover Remove the seventeen 17 screws in the upper cover Chapter Removing the Touchpad Board Removing the Bluetooth Module Removing the LCD Module Remove two 2 screws from the hinge Removing the Mainboard Chapter Removing the Thermal Module Lift the thermal module away from the main board Removing the Speakers Step Screw Quantity Screw Type Speaker Disassembly Lift the speakers clear of the lower cover LCD Module Disassembly Flowchart LCD Module Disassembly Process Step Screw Quantity Screw Type Remove LCD Bezel M2.5*4 Removing the LCD BezelPage Removing the Camera Board Step Screw Quantity Screw Type Remove LCD Panel M2x3 Removing the LCD Panel Chapter Removing the LCD Cover Hinges Replacing the LCD Cover Hinges LCD Reassembly Procedure Replacing the LCD FPC Cable Replacing the LCD Panel Step Screw Quantity Screw Type LCD Panel Assembly Replacing the Camera Board Replacing the LCD Bezel Step Screw Quantity Screw Type Replace LCD Bezel M2.5*4 Replacing the Speakers Main Unit Reassembly ProcessPage Replacing the Thermal Module Replacing the Mainboard M2.5x5 Replacing the LCD Module Place the Lvds cable in the hinge channel as shown Chapter Replacing the Bluetooth Module Replacing the Touchpad Board Replacing the Upper Cover Step Size Quantity Screw Type 100 Chapter Replacing the Keyboard Replacing the Hard Disk Drive Page Replacing the Dimm Module Replacing the 3G Module Replacing the Wireless LAN Module Connect the two 2 Wlan antennas Chapter 107 Replace the Dummy Card Replacing the Base Door Replacing the Battery 110 Chapter Symptoms Verified Go To Common Problems Computer Shuts down Intermittently Power On Issue No Post or Video No Display Issue Abnormal Video Display Random Loss of Bios Settings LCD Failure Built-In Keyboard Failure TouchPad Failure Internal Speaker Failure Sound Problems Internal Microphone Failure Microphone ProblemsSelect Set up microphone Other Failures HDD Not Operating CorrectlySelect Repair your computer Select Startup Repair Undetermined Problems Intermittent Problems Code Beeps Post Routine Description Post Code Reference TablesPost Code Range Post Routine Description Code Beeps Post Routine Description 124 Chapter Code Beeps For Boot Block in Flash ROM 126 Chapter Mainboard Top View Jumper and Connector Locations Mainboard Bottom View Bios Recovery by Crisis Disk Bios RecoveryBios Recovery Boot Block Bios Recovery Hotkey 130 Chapter FRU Field Replaceable Unit List Exploded Diagrams Description Part Number Main Assembly Chapter 133 LCD Assembly Category Description Adapter FRU List Category Description Category Description LCD Module Mainboard Screw List Appendix a Model Definition and Configuration Model Acer Part No Country Description AO521 TWN Gctwn AO521 LU.SBS0D.056 AO521 LU.SBS0D.041 AO521 LU.SBS0D.024 AO521 LU.SBS0D.007 Memory Chip Model Acer Part No AO521 LU.SBT0D.007 105Hk 05B AO521 LU.SBS0D.030 AAK32 1GB 2GB Model Acer Part No MemoryMedia Processor 152 N250G 105Dk B5.4KS AO521 154 HDD ODD Media Processor 1GB 2GB AO521-12BHk 158 Appendix B Modem Keyboard Wireless LAN WiFi AntennaType Description NB Chipset SB Chipset 162 Appendix C Online Support Information 164 Index Block Diagram 167

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