Lenovo 11 manual Safety inspection guide

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Safety information

Safety inspection guide

The purpose of this inspection guide is to assist you in identifying potential unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service personnel from injury. This guide addresses only those items. You should use good judgment to identify potential safety hazards according to the attachment of non-Lenovo IdeaPad features or options not covered by this inspection guide.

If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

Consider these conditions and the safety hazards they present:

•• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock)

•• Explosive hazards, such as a damaged CRT face or a bulging capacitor

•• Mechanical hazards, such as loose or missing hardware

To determine whether there are any potential unsafe conditions, use the following checklist at the beginning of every service task. Begin the checks with the power off, and the power cord disconnected.

Checklist:

1.Check exterior covers for damage (loose, broken, or sharp edges).

2.Turn off the computer. Disconnect the power cord.

3.Check the power cord for:

a.A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and the frame ground.

b.The power cord should be the type specified in the parts list.

c.Insulation must not be frayed or worn.

4.Check for cracked or bulging batteries.

5.Remove the cover.

6.Check for any obvious non-Lenovo IdeaPad alterations. Use good judgment as to the safety of any non-Lenovo IdeaPad alterations.

7.Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

8.Check for worn, frayed, or pinched cables.

9.Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

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Contents Lenovo IdeaPad Yoga First Edition Oct Copyright Lenovo 2012. All rights reserved Contents About this manual Safety information General safety Electrical safety IdeaPad Yoga 11 Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notice Safety notices multilingual translationsIdeaPad Yoga 11 Hardware Maintenance Manual Safety information IdeaPad Yoga 11 Hardware Maintenance Manual Safety information IdeaPad Yoga 11 Hardware Maintenance Manual Safety information Laser compliance statement Safety information Strategy for replacing FRUs Important service informationImportant notice for replacing a system board Important service informationImportant information about replacing RoHS compliant FRUs General checkout What to do first Following are not covered under warrantyPower system checkout Checking the AC adapterChecking operational charging IdeaPad Yoga 11 Hardware Maintenance Manual Restoring the factory contents by using OneKey Recovery Related service informationPasswords Power-on passwordSupervisor password Power management Screen blank modeSleep standby mode Lenovo IdeaPad Yoga SpecificationsLenovo IdeaPad Yoga Status indicators Status indicatorsFunction keys Function key combinationsScrew notices FRU replacement noticesRemoving and replacing an FRU Removal step of dummy card Dummy cardRemoval steps of keyboard KeyboardIdeaPad Yoga 11 Hardware Maintenance Manual Remove the four screws 1 and the six screws Keyboard bezelRemove the base cover in the direction shown by arrow Removal steps of screen rotation lock button board Screen rotation lock button boardRemove the battery pack in the direction shown by arrow Removal steps of battery pack Battery packIdeaPad Yoga 11 Hardware Maintenance Manual Removal steps of hard disk drive Volume button boardIdeaPad Yoga 11 Hardware Maintenance Manual Removal steps of PCI Express Mini Card for wireless LAN PCI Express Mini Card for wireless LANWhen installing Removal steps of Dimm SpeakersRemove the speakers in the direction shown by arrows Important notices for handling the system board System boardIdeaPad Yoga 11 Hardware Maintenance Manual Step Screw quantity Color Torque Removal steps of LCD unit LCD unitRemove the LCD unit in the direction shown by arrow Removal step of base cover Base coverLenovo IdeaPad Yoga Front view and right-side view LocationsBottom and Left-side view Parts list Overall Parts list-Overall Parts list-Keyboard IdeaPad Yoga 11 Hardware Maintenance Manual Miscellaneous parts Parts list-Miscellaneous partsParts list-2-pin power cords Power cordsPage Trademarks