AO521 LU.SBS0D.024 | Acer guide

Model	Acer Part No	RO	Country	Description

AO521-	LU.SBS0D.024	EMEA	Hungary	AO521-105Dk SNW7ST32STHU1 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_HU11

AO521-	LU.SBS0D.023	EMEA	Denmark	AO521-105Dk SNW7ST32STDK1 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_NO11

AO521-	LU.SBS0D.022	EMEA	Baltic	AO521-105Dk SNW7ST32STBC3 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_SV21

AO521-	LU.SBS0D.021	EMEA	Czech	AO521-105Dk SNW7ST32STCZ2 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_SK11

AO521-	LU.SBS0D.020	EMEA	Cyprus	AO521-105Dk SNW7ST32STCY1 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.019	EMEA	Belgium	AO521-105Dk SNW7ST32STBE1 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_NL11

AO521-	LU.SBS0D.018	EMEA	South	AO521-105Dk EM SNW7ST32EMSTZA2 MC
105Dk			Africa	UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.017	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTMEB
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ARA1

AO521-	LU.SBS0D.016	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME2
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_AR21

AO521-	LU.SBS0D.015	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME6
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.014	EMEA	South	AO521-105Dk EM SNW7ST32EMSTZA6 MC
105Dk			Africa	UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_PT11

AO521-	LU.SBS0D.013	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME3
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES81

AO521-	LU.SBS0D.012	EMEA	South	AO521-105Dk EM SNW7ST32EMSTZA5 MC
105Dk			Africa	UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.011	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME4
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.010	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME2
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES61

AO521-	LU.SBS0D.009	EMEA	Algeria	AO521-105Dk EM SNW7ST32EMSTDZ1 MC
105Dk				UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES81

AO521-	LU.SBS0D.008	EMEA	Middle	AO521-105Dk EM SNW7ST32EMSTME9
105Dk			East	MC UMACki_3 1*1G/250/6L2.2/5R/
				CBSDS_GN_1.3C_GEk_ES81

144	Appendix A

Image 154

Acer manual AO521 LU.SBS0D.024

Contents

Aspire one 521 Series Service Guide Revision History Copyright Conventions Preface Page Table of Contents 111 AO521 Table of Contents Features Chapter Optical Media Drive Storage subsystemAudio subsystem Communication Accessories Dimensions and WeightPower Adapter and Battery Special Keys and Controls Warranty Environment System Block Diagram AMD ASB2 CPU Top View Icon Description Closed Front View Left View Right View Base View IndicatorsIcon Function Description TouchPad Basics Function Left Button Right Button Main TouchPad Lock Keys and embedded numeric keypad Using the KeyboardDesired access Num Lock on Num Lock off Lock key Description Windows Keys Key Description Hot Keys Hotkey Icon Function Description Special Keys Euro symbolUS dollar sign Processor Specifications Hardware Specifications and ConfigurationsProcessor Specification 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 System Memory Specification USB Hard Disk Drive Interface Specification LCD Specification Bluetooth Specification Lvds Keyboard Specification Audio Codec and Amplifier SpecificationLAN Interface Specification Media Card Reader Specification Wireless LAN Specification Battery Specification Cell Interface Specifications Bios Setup Utility Navigating the Bios Utility Information Parameter Description Main Parameter Description Format/Option Security Setting a PasswordDisabled or Parameter Description Option Enter New Password Removing a Password Changing a Password Continue Boot Information Main Security Boot Exit Exit Exit Exit Saving Changes Bios Flash Utility DOS Flash Utility Page WinFlash Utility Remove HDD Password Remove HDD/BIOS Password UtilitiesSelect Enter Unlock Password and press Enter Removing Bios Passwords Using DMITools Using Boot Sequence SelectorMiscellaneous Utilities Using the LAN MAC Utility Example 1 Read DMI Information from Memory Replacement Requirements Disassembly RequirementsRelated Information Pre-disassembly Instructions Disassembly Process Main Screw List Quantity Acer Part Number External Modules Disassembly Flowchart External Module Disassembly ProcessScrew List Step Quantity Removing the Battery Pack Removing the Dummy Card Removing the Base Door Step Screw Quantity Screw Type 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 Step Screw Quantity Screw Type 3G Module Disassembly Removing the 3G Module Pull the 3Gmodule out and away Chapter Main Unit Disassembly Process Main Unit Disassembly Flowchart 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 Step Screw Quantity Screw Type Speaker Disassembly Removing the Speakers Lift the speakers clear of the lower cover LCD Module Disassembly Process LCD Module Disassembly Flowchart Removing the LCD Bezel Step Screw Quantity Screw Type Remove LCD Bezel M2.5*4Page Removing the Camera Board Removing the LCD Panel Step Screw Quantity Screw Type Remove LCD Panel M2x3 Chapter Removing the LCD Cover Hinges LCD Reassembly Procedure Replacing the LCD Cover Hinges Replacing the LCD FPC Cable Step Screw Quantity Screw Type LCD Panel Assembly Replacing the LCD Panel Replacing the Camera Board Replacing the LCD Bezel Step Screw Quantity Screw Type Replace LCD Bezel M2.5*4 Main Unit Reassembly Process Replacing the SpeakersPage Replacing the Thermal Module Replacing the Mainboard Replacing the LCD Module M2.5x5 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 Replacing the Base Door Replace the Dummy Card Replacing the Battery 110 Chapter Common Problems Symptoms Verified Go To Power On Issue Computer Shuts down Intermittently No Display Issue No Post or Video Random Loss of Bios Settings Abnormal Video Display LCD Failure Built-In Keyboard Failure TouchPad Failure Sound Problems Internal Speaker Failure Select Set up microphone Microphone ProblemsInternal Microphone Failure Select Repair your computer HDD Not Operating CorrectlyOther Failures Select Startup Repair Intermittent Problems Undetermined Problems Post Code Range Post Routine Description Post Code Reference TablesCode Beeps Post Routine Description Code Beeps Post Routine Description 124 Chapter Code Beeps For Boot Block in Flash ROM 126 Chapter Jumper and Connector Locations Mainboard Top View Mainboard Bottom View Bios Recovery Boot Block Bios RecoveryBios Recovery by Crisis Disk Bios Recovery Hotkey 130 Chapter Exploded Diagrams FRU Field Replaceable Unit List Main Assembly Description Part Number Chapter 133 LCD Assembly FRU List Category Description Adapter Category Description Category Description LCD Module Screw List Mainboard Model Definition and Configuration Appendix a AO521 Model Acer Part No Country Description TWN Gctwn AO521 LU.SBS0D.056 AO521 LU.SBS0D.041 AO521 LU.SBS0D.024 AO521 LU.SBS0D.007 Model Acer Part No Memory Chip AO521 LU.SBT0D.007 105Hk 05B AO521 LU.SBS0D.030 AAK32 Media Processor Model Acer Part No Memory1GB 2GB 152 N250G 105Dk B5.4KS AO521 154 HDD ODD Media Processor 1GB 2GB AO521-12BHk 158 Appendix B Keyboard Modem Type Description NB Chipset WiFi AntennaWireless LAN SB Chipset 162 Online Support Information Appendix C 164 Index Block Diagram 167