Lenovo N100 manual Checking operational charging, Checking the battery pack, Pin Voltage V dc

Page 33

Checkout guide

3

2

1

(20V)

Pin

Voltage (V dc)

1+20

20

3Ground

Note: Output voltage of pin no.2 of the ac adapter may different from the one you are servicing.

3.If the voltage is not correct, replace the ac adapter.

4.If the voltage is acceptable, do the following: v Replace the system board.

vIf the problem persists, go to “Product overview” on page 30.

Note: Noise from the ac adapter does not always indicate a defect.

Checking operational charging

To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack.

If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.

Checking the battery pack

Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.

To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.

Note: If the battery pack becomes hot, it may not be able to charge. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.

To check the battery pack, do the following:

1.Power off the computer.

2.Remove the battery pack and measure the voltage between battery terminals 1

(+) and 7 (−). See the following figure:

General descriptions

27

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Contents Lenovo 3000 N100 Hardware Maintenance Manual Page Lenovo 3000 N100 Hardware Maintenance Manual Page Contents Iv MT 0689, 0690 Before replacing parts Important service informationAbout this manual Strategy for replacing FRUsHow to use error messages Strategy for replacing a hard disk driveImportant notice for replacing a system board Using PC Entitlement Warehouse PEW Using eSupportUsing the HMM Important information about replacing RoHS compliant FRUs Safety notice Safety notices multilingual translationsDiskette compatibility matrix Diskette Compatibility Drive CapacitySafety notices Safety notices Safety notices Safety notices 10 MT 0689, 0690 Safety information General safetyElectrical safety 12 MT 0689, 0690 Safety inspection guide Grounding requirements Laser compliance statement 16 MT 0689, 0690 What to do first Read this firstRead this first Following are not covered under warrantyRelated service information Service Web site Restoring the pre-installed systemRecovery to Factory Contents by using Product Recovery CDs How to remove the power-on password PasswordsSelect Power-On Password How to remove the hard-disk passwordScreen blank mode Power managementStandby mode Select Master HDPHibernation mode Testing the computer Creating the PC-Doctor diagnostics disketteCheckout guide Diagnostics Interactive Tests Detecting system information with PC-Doctor Power system checkoutHardware Info UtilityChecking the battery pack Checking operational chargingPin Voltage V dc Terminal Voltage V dc Lenovo 3000 N100 Specifications Feature DescriptionProduct overview Lenovo 3000 N100 Indicator Meaning Status indicatorsGreen Blinking greenFRU tests Key combination Description Fn key combinationsNumeric error codes Symptom-to-FRU indexFail-safe timer NMI failed System board DMA test failed System board 02F6Software NMI failed System board 02F7 Error messages No-beep symptoms Beep symptomsReseat the LCD connectors LCD-related symptomsSymptoms LCD assemblyUndetermined problems Intermittent problemsFRU replacement notices Screw noticesRetaining serial numbers Retaining the Uuid Restoring the serial number of the system unitReading or writing the ECA information Select 2. Read S/N data from EepromFRU replacement notices Removing and replacing a FRU Battery pack Hard disk drive slot cover Hard disk driveStep Screw quantity Color Torque PCI Express Mini Card for wireless LAN Dimm Dimm slot coverOptical drive For MT0689For MT0768 Thermal module slot cover and fan Thermal module 52 MT 0689, 0690 1100 CPU Cover, strip E cover Keyboard 56 MT 0689, 0690 Function board LCD unit Removing and replacing a FRU 60 MT 0689, 0690 M2.5 × 6 mm, flat-head, nylon-coated Black 392 Nm Kgfcm Are only for MT 0689 For MT 0689Are only for MT For MT64 MT 0689, 0690 M2 × 4 mm, flat-head, nylon-coated Black 245 Nm Kgfcm 1160 USB/Audio connector card VGA connector card 68 MT 0689, 0690 M2.5 × 3 mm, flat-head, nylon-coated Black 392 Nm Kgfcm To remove the MDC, do as follows Step Screw cap Screw quantity Color Torque LCD front bezel B coverInverter card LCD panel, LCD cable, and hinges Remove the hinges from the LCD panel Are only for MT0768 Camera and LCD rear cover assembly a cover Locations Front view Bottom view Rear viewParts list Overall FRU CRU FRU no RoHSAstec AC adapters14.1-in. Wxga TFT LCD FRUs15.4-in. WSXGA+ TFT 15.4-in. Wxga TFTChicony Language RoHSWindows XP Professional Recovery CDsTBD Windows XP Home EditionMiscellaneous parts Bluetooth cableCommon parts list ToolsTool Region RoHS Power cords90 MT 0689, 0690 Trademarks Part Number 41W7535
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N100 specifications

The Lenovo N100 is a budget-friendly laptop that embodies practicality without sacrificing essential performance features. Designed for students and professionals alike, it combines mobility with reliability, making it a suitable choice for everyday computing tasks.

One of the standout features of the Lenovo N100 is its efficient Intel processor. Depending on the specific configuration, users can expect either the Intel Celeron or Pentium M processors, providing sufficient power for basic applications, web browsing, and productivity software. The laptop is equipped with up to 1GB of RAM, ensuring smooth multitasking capabilities for users working on several applications simultaneously.

In terms of storage, the N100 includes options that range from 40GB to 80GB hard drives. This capacity caters well to the needs of users who require ample storage for documents, media, and various software applications. The integrated CD/DVD drive further enhances its versatility, enabling users to read and write discs, which is particularly useful for those who rely on physical media.

The Lenovo N100 features a 14-inch display with a resolution of 1280x800 pixels, providing a decent viewing experience for its size. The screen's size strikes a good balance between portability and usability, making it easy to work on for extended periods without straining the eyes. Additionally, the inbuilt Intel Graphics Media Accelerator 900 offers sufficient graphical performance for light gaming and multimedia tasks.

Connectivity options on the Lenovo N100 include several USB 2.0 ports, an Ethernet port, and a VGA output, which allow for connecting various peripherals and external displays. The laptop also includes a 56K modem, making it adaptable to older connectivity setups. Integration of Wi-Fi support provides users the freedom to connect to wireless networks, enhancing functionality for both home and office use.

Another significant characteristic of the N100 is its durable design. While its aesthetics may be straightforward, the solid build quality ensures that it withstands the rigors of daily use. This toughness is complemented by a battery life that can last several hours, allowing users the flexibility to work on the go without the constant need for a power outlet.

In conclusion, the Lenovo N100 stands out as a reliable and affordable laptop option, equipped with essential features that cater to basic computing needs. Its combination of performance, storage, and connectivity makes it a practical choice for users looking for value and reliability in their laptop purchase.
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