Lenovo U260 manual FRU replacement notices, Screw notices

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IdeaPad U260 Hardware Maintenance Manual

FRU replacement notices

This section presents notices related to removing and replacing parts. Read this section carefully before replacing any FRU.

Screw notices

Loose screws can cause a reliability problem. In the Lenovo IdeaPad computer, this problem is addressed with special nylon-coated screws that have the following characteristics:

•• They maintain tight connections.

•• They do not easily come loose, even with shock or vibration.

•• They are harder to tighten.

•• Each one should be used only once.

Do the following when you service this machine:

•• Keep the screw kit in your tool bag.

•• Always use new screws.

•• Use a torque screwdriver if you have one.

Tighten screws as follows:

•• Plastic to plastic

Turn an additional 90° after the screw head touches the surface of the plastic part:

more than 90°

(Cross-section)

•• Logic card to plastic

Turn an additional 180° after the screw head touches the surface of the logic card:

more than 180°

(Cross-section)

•• Torque driver

If you have a torque screwdriver , refer to the “Torque” column for each step.

•• Make sure that you use the correct screws. If you have a torque screwdriver, tighten all screws firmly to the torque shown in the table. Never use a screw that you removed. Use a new one. Make sure that all screws are tightened firmly.

•• Ensure torque screwdrivers are calibrated correctly following country specifications.

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Contents IdeaPad U260 First Edition Aug Copyright Lenovo 2010. All rights reserved Contents About this manual Safety information General safety Electrical safety IdeaPad U260 Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notices multilingual translations Safety noticeIdeaPad U260 Hardware Maintenance Manual Safety information IdeaPad U260 Hardware Maintenance Manual Safety information IdeaPad U260 Hardware Maintenance Manual Safety information Laser compliance statement Safety information Important service information Strategy for replacing FRUsStrategy for replacing a hard disk drive Important notice for replacing a system boardImportant information about replacing RoHS compliant FRUs General checkout Following are not covered under warranty What to do firstPower system checkout Checking the AC adapterChecking operational charging Checking the battery pack Related service information Restoring the factory contents by using OneKey RecoveryPasswords Power-on passwordSupervisor password Power management Screen blank modeSleep standby mode Hibernation mode Specifications SpecificationsIdeaPad U260 Hardware Maintenance Manual Status indicators Status indicatorsFlashing white Fn key combinations Fn key combinationsFRU replacement notices Screw noticesRemoving and replacing an FRU Keyboard Removal steps of keyboardKeyboard bezel Removal steps of keyboard bezelIdeaPad U260 Hardware Maintenance Manual M1.98 × 3 mm, flat-head, nylok-coated White ~1.5 kgfcm M1.98 × 3 mm, flat-head, nylok-coated White Battery pack Removal steps of battery packPCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless LANWhen installing LCD unit Removal steps of LCD unitRemove the LCD unit in the direction shown by arrows Hard disk drive Removal steps of hard disk driveDimm Removal steps of DimmFan assembly and Heat Sink assembly Removal steps of fan assembly and heat sink assemblyWhen installing Speakers Removal steps of speakersSystem board Important notices for handling the system boardRemoval steps of system board Base cover Removal steps of base coverIdeaPad U260 Hardware Maintenance Manual LCD front bezel Removal steps of LCD front bezelLCD panel, LCD cable and hinges Removal steps of LCD panel, LCD cable and hingesM2 × 3 mm, flat-head, nylok-coated Black ~1.5 kgfcm Integrated camera Removal steps of integrated cameraAntenna assembly and LCD cover Removal steps of antenna assembly and LCD coverLocations Front viewRight-side view Bottom and Left-side viewParts list Overall Parts list-Overall No. FRU FRU noNIUM1 Logic LOWER-BROWN AM0DZ000310 LCD FRUs Parts list-12.5-in. HD TFT 12.5-in. HD TFTParts list-Keyboard Parts list-Miscellaneous parts Miscellaneous partsParts list-3-pin AC adapters AC adaptersPower cords Parts list-3-pin power cords145000538 Lenovo IdeaPad U260 IdeaPad U260 Hardware Maintenance Manual Trademarks APS
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