Acer Aspire One Model Nav Service Guide
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Chapter 5131 I/O Board Top View ItemDescription JP21 Function/B Connector JP4 Internal MIC JP20 Speaker CONN JREAD1 Card Reader Socket JP2 Bridge/B Connector
132Chapter 5 I/O Board Bottom View ItemDescription JRJ45 RJ45 Connector JUSB1 USB Connector JMIC1 MIC-In Jack JHP1 Head-Phone Jack JMINI1 WLAN Connector
Chapter 5133 Clearing Password Check and BIOS Recovery This section provide you the standard operating procedures of clearing password and BIOS recovery for NAV50. NAV50 provides one Hardware Open Gap on main board for clearing password check, and one Hotkey for enabling BIOS Recovery. Clearing Password Check Hardware Open Gap Description Steps for Clearing BIOS Password Check If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask the password during systems POST or when systems enter to BIOS Setup menu. However, once it is necessary to bypass the password check, users need to short the HW Gap to clear the password by the following steps: • Power Off the system, and remove HDD, AC and Battery from the machine. • Open the back cover of the machine, and locate the HW Gap on M/B as shown above. • Use an electric conductivity tool to short the two points of the HW Gap. • Plug in AC power, keep the short condition on the HW Gap, and press Power Button to power on the system till BIOS POST finish. Then remove the tool from the HW Gap. • Restart system. Press F2 key to enter BIOS Setup menu. • If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and try again. NOTE: The steps are only for clearing BIOS Password (Supervisor Password and User Password). ItemDescriptionLocation R1184 Clear CMOS Jumper Located near DIMM Module
134Chapter 5 BIOS Recovery by Crisis Disk BIOS Recovery Boot Block: BIOS Recovery Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous BIOS flashing process failed. BIOS Recovery Hotkey: The system provides a function hotkey: Fn+Esc, for enable BIOS Recovery process when system is powered on during BIOS POST. To use this function, it is strongly recommended to have the AC adapter and Battery present. If this function is enabled, the system will force the BIOS to enter a special BIOS block, called Boot Block. Steps for BIOS Recovery by USB Flash Crisis Disk: Before doing this, a Crisis Diskette should be prepared ready in hand. The Crisis Diskette could be made by executing the Crisis Disk program in another system with Windows XP OS. Follow the steps below: 1.Plug in the USB disk. 2.Launch the wincris.exe program to create a USB Crisis Disk. Click Start to initiate the process. 3.Select the Quick Format option to format the disk and click Start. Follow the instructions on the screen to create the disk. 4.Copy the KAV60.fd BIOS file into USB flash disk root directory. NOTE: Do not place any other *.fd file in the USB flash disk root directory. To use the Crisis USB key, do the following: 1.Plug USB storage into USB port. 2.Press Fn + ESC button then plug in AC power. The Power button flashes orange once. 3.Press Power button to initiate system CRISIS mode. When CRISIS is complete, the system auto restarts with a workable BIOS. 4.Update the latest version BIOS for this machine by regular BIOS flashing process.
Chapter 6135 FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of NAV50. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines. NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it. Chapter 6
136Chapter 6 NAV50 Exploded Diagrams Main Assembly ItemDescriptionPart Number 1 LCD Assembly 6M.SAL02.001 2 Upper Cover 60.SAL02.001 3 Bridge Board 55.SAS02.002 4 Mainboard MB.SAL02.001 5 Speaker Module 23.SAT02.001 6 DC-in Port 50.SAS02.002 7 Lower Cover 60.SAM02.001 8 I/O Board 55.SAS02.003 1 2 3 4 5 6 78
Chapter 6137 Rear Assembly ItemDescriptionPart Number 1 HDD Door 42.SAL02.001 2 DIMM Door 42.SAL02.002 3 Lower Cover 60.SAM02.001 1 2 3
138Chapter 6 Upper Cover Assembly ItemDescriptionPart Number 1 TouchPad Board 2 LED Board 55.SAS02.004 3 Upper Cover 60.SAL02.001 1 2 3
Chapter 6139 NAV50 FRU List CATEGORYAcer Description AcerPN BOARD BLUE TOOTH 2.1 BH.21100.004 CARD READER BOARD 55.SAS02.001 BRIDGE BOARD 55.SAS02.002 BUTTON BOARD 55.SAS02.003 LED BOARD 55.SAS02.004 FOXCONN WIRELESS LAN ATHEROS HB93 1X2 BGN (HM)NI.23600.046 FOXCONN WIRELSS LAN ATHEROS HB95 1X1 BG (HM) NI.23600.047 FOXCONN WIRELESS LAN BROADCOM 4312H BG (HM) NI.23600.053 HUAWEI EM770W LC.21300.008 3G UNDP-1 LC.21300.005 ERICSSON F3307-850MHZ LC.21300.038 FOXCONN BROADCOM BCM970010 MEDIA PROCESSOR MINI-CARD LINK W/ H.264/VC1/MPEG2 LA.20500.003 FOXCONN QUARTICS QV1721 MEDIA CO-PROCESSOR MINI-CARD TTH130.00 WLA.23700.001 CABLE BLUE TOOTH CABLE 50.SAS02.001 DC-IN CABLE 50.SAS02.002 AC CLIP US 27.WH202.001 AC CLIP EU 27.WH202.002 AC CLIP AUSTRALIA 27.WH202.003 AC CLIP UK 27.WH202.004 AC CLIP ARGETINA 27.WH202.005 AC CLIP CHINA 27.WH202.006 AC CLIP BRAZIL 27.WH202.007 AC CLIP S-AFRICA 27.WH202.008 AC CLIP KOREA 27.WH202.009 CASE/COVER/BRACKET ASSEMBLY
140Chapter 6 UPPER CASE ASSY FOR W/BT, INCL.TP/TP MYLAR - BLUE60.SAL02.001 UPPER CASE ASSY FOR W/O BT, INCL.TP/TP MYLAR - BLUE60.SAL02.002 UPPER CASE ASSY FOR W/BT, INCL.TP/TP MYLAR - SILVER60.SAS02.001 UPPER CASE ASSY FOR W/O BT, INCL.TP/TP MYLAR - SILVER60.SAS02.002 UPPER CASE ASSY FOR W/BT, INCL.TP/TP MYLAR - RED60.SAQ02.001 UPPER CASE ASSY FOR W/O BT, INCL.TP/TP MYLAR - RED60.SAQ02.002 UPPER CASE ASSY FOR W/BT, INCL.TP/TP MYLAR - PINK60.SAS02.003 UPPER CASE ASSY FOR W/O BT, INCL. TP/TP MYLAR - PINK60.SAS02.004 LOWER CASE ASSY FOR W/3G-BLACK 60.SAM02.001 LOWER CASE ASSY FOR W/O 3G-BLACK 60.SAL02.003 LOWER CASE ASSY FOR W/3G-WHITE 60.SAT02.001 LOWER CASE ASSY FOR W/O 3G-WHITE 60.SAS02.005 HDD DOOR-BLACK 42.SAL02.001 HDD DOOR-WHITE 42.SAS02.001 RAM DOOR-BLACK 42.SAL02.002 RAM DOOR-WHITE 42.SAS02.002 HDD HOUSING 33.SAS02.001 KEYBOARD Keyboard ACER NT0T JV01_PT Internal 10 Standard 84KS Black US International TextureKB.I100A.026 Keyboard ACER NT0T JV01_PT Internal 10 Standard 84KS Black Greek TextureKB.I100A.011 Keyboard ACER NT0T JV01_PT Internal 10 Standard 84KS Black Arabic TextureKB.I100A.002 Keyboard ACER NT0T JV01_PT Internal 10 Standard 84KS Black Chinese TextureKB.I100A.006 Keyboard ACER NT0T JV01_PT Internal 10 Standard 84KS Black Russian TextureKB.I100A.018 CATEGORYAcer Description AcerPN