Lenovo 33472YU, S230U, 33472GU manual Using headphones or earphones, Additional safety information

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Using headphones or earphones

CAUTION:

Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer to maximum increases the earphone and headphone output voltage and the sound pressure level. Therefore, to protect your hearing, adjust the equalizer to an appropriate level.

Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification limits the computer’s maximum wide band true RMS output voltage to 150 mV. To help protect against hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7 limits) for a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-2 can be dangerous due to excessive sound pressure levels.

If your Lenovo computer came with headphones or earphones in the package, as a set, the combination of the headphones or earphones and the computer already complies with the specifications of EN 50332-1. If different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5 Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to excessive sound pressure levels.

Additional safety information

DANGER

Plastic bags can be dangerous. Keep plastic bags away from babies and children to avoid danger of suffocation.

Notice for tablet personal computer users

Safety notice for users in Australia

DANGER

Do not connect phone line while using tablet mode.

Notice for users in the U.S.A.

Many personal computer products and accessories contain cords, cables or wires, such as power cords or cords to connect the accessory to a personal computer. If this product has such a cord, cable or wire, then the following warning applies:

WARNING: Handling the cord on this product or cords associated with accessories sold with this product will expose you to lead, a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling.

Save these instructions.

© Copyright Lenovo 2012

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Contents User Guide Second Edition December Copyright Lenovo Safety, Warranty, and Setup Guide Regulatory NoticeContents Preventing problems Protect yourself from the heat that your computer generates Read this firstPrevent your computer from getting wet Protect the cables from being damagedProtect your computer and data when moving it Important safety informationHandle your computer gently Carry your computer carefullyService and upgrades Safety guidelinesConditions that require immediate action Power cords and power adapters Extension cords and related devices Power supply statementPlugs and outlets ViiBuilt-in rechargeable battery notice General battery noticeLithium coin cell battery notice External devicesHeat and product ventilation Liquid crystal display LCD notice Electrical current safety informationAdditional safety information Using headphones or earphonesXii User Guide Product overview Locating computer controls, connectors, and indicatorsFront view System status indicator illuminated ThinkPad logo Volume control buttonsIntegrated camera Built-in microphonesMini DisplayPort connector USB 3.0 connectorRight-side view Hard disk or solid-state drive bayLeft-side view Ethernet connector Mini Hdmi connectorCombo audio jack Media card reader slotSystem status indicators Status indicatorsIntegrated battery Bottom viewPower status indicator Machine type and model label Locating important product informationFCC ID and IC Certification number label FeaturesSpecifications Battery life Battery packOperating environment Lenovo programsLenovo Mobile Access Lenovo SettingsLenovo Solution Center Lenovo Support Password ManagerFrequently asked questions Using your computerRegistering your computer Using tablet mode Tablet modeIs getting connected in different locations a challenge? Need to attach or replace a device?Using your computer Tips on using your computer in tablet mode Using the multi-touch screen Cleaning the multi-touch screen Tips on using the multi-touch screenSpecial keys and buttons Using the tablet buttonsDisplay management keys Function keys Volume and mute keysOther functions Select Config Keyboard/Mouse Change to F1-F12 keys Using the UltraNav pointing deviceChanging the UltraNav pointing device settings Windows keyCustomizing the TrackPoint pointing device Using the TrackPoint pointing deviceChanging the cap Disabling the UltraNav pointing device Using the touch padCustomizing the touch pad Using the battery power Power managementChecking the battery status Adding the UltraNav icon to the Windows notification areaCharging the battery Using the ac power adapterMaximizing the battery life Connecting the ac power adapterPower-saving modes Managing the power plansConnecting to the network Click More power optionsUsing the wireless LAN and wireless WAN connections Wireless connectionsEthernet connections Using Bluetooth Changing the display settingsPresentations and Multimedia Considerations for using an external monitor Using an external displaySetting the main display Using audio features Using a projectorSetting the monitor type Set Resolution Click Advanced SettingsUsing a media card Using the integrated cameraConfiguring for sound recording Configuring camera settingsRemoving a media card Inserting a media cardClick Hardware and Sound Device Manager Right-click the Safely Remove Hardware and Eject Media iconYou and your computer Accessibility and comfortErgonomic information Comfort Accessibility informationTraveling with your computer Travel accessoriesTravel tips Assistive technologiesUser Guide Passwords and sleep mode Using passwordsTyping passwords SecurityHard disk passwords Power-on passwordSetting a power-on password Select Power-on PasswordSelect Hard Disk 1 Password Setting a hard disk passwordChanging or removing a hard disk password Supervisor passwordSelect Supervisor Password Setting, changing, or removing a supervisor passwordHard disk security Using Windows BitLocker Drive EncryptionSetting the security chip Setting the security chipClick System and Security BitLocker Drive Encryption Protecting data against viruses Using firewallsSecurity User Guide Refreshing your computer Recovery overviewUser Guide Select Disable Built-in Battery Disabling the built-in batteryReplacing devices Static electricity preventionUser Guide Replacing the hard disk drive or solid-state drive User Guide Replacing the keyboard User Guide Replacing devices User Guide Replacing a Mini PCI ExpressCard for wireless LAN connection User Guide Replacing devices Installing or replacing the wireless WAN card Replacing devices User Guide Replacing devices User Guide Installing a new operating system Advanced configurationInstalling the Windows 8 operating system Select Startup BootInstalling the Windows 8 fix module Installing device drivers ThinkPad SetupMain menu Menu item Submenu item Selection Comments Network Config menuAC Only Menu item Submenu item Selection Comments EnabledIPv4 First Default DisabledAuto Keyboard/MouseBattery Optimized Always PowerMenu item Submenu item Selection Comments Display ThinkPad LCDDate/Time menu Menu item Submenu item Selection Comments Beep and AlarmSecurity menu Serial ATA SataAt unattended boot, a password Menu item Submenu item Selection Comments PasswordBios ROM String Reporting Disabled, the Security Chip optionSmbios Reporting Smbios Uefi Bios Update OptionMenu item Submenu item Selection Comments Virtualization Port AccessAnti-Theft Startup menu Menu item Submenu item Selection Comments Secure BootChanging the startup sequence Uefi Only and set CSM SupportNetwork Boot Menu item Selection Comments BootUEFI/Legacy Boot Uefi Only UEFI/Legacy Boot Priority Uefi FirstUsing system management Updating your system Uefi BiosMenu item Selection Comments Boot Device List F12 Option Boot Order Lock DisabledSystem management Setting management featuresFlash update Network Boot sequenceUser Guide General tips for preventing problems Preventing problemsMaking sure device drivers are current Getting the latest drivers using System UpdateGetting the latest drivers from the Web site Taking care of your computer Be careful about where and how you workBe gentle with your computer Carry your computer properlyTake care in setting passwords Cleaning the cover of your computerCleaning your computer keyboard Register your computer Be sure not to modify your computerCleaning your computer display User Guide Diagnosing problems Troubleshooting computer problemsTroubleshooting Computer stops respondingSpills on the keyboard Error messagesIf you spill something on your computer Troubleshooting computer problems Errors without messages Memory module problems Beep errorsProblem Solution Ethernet problems Networking problemsSolution Wireless WAN problem Wireless LAN problemBluetooth problems Click Hardware and Sound Sound PlaybackUltraNav pointing device problems Problems with the keyboard and other pointing devicesKeyboard problems Computer screen problems Problems with the display and multimedia devicesExternal monitor problems Set Resolution Audio problems Battery problems Battery and power problemsPower problems An ac power adapter problemBoot problems Power button problemSleep problems Hard disk drive problems Problems with drives and other storage devicesSolid-state drive problem Optical drive problemsSoftware problem USB problem Problems with ports and connectorsGetting support Getting help and serviceBefore you contact Lenovo Lenovo Support Web site Using diagnostic programsCalling Lenovo Finding ThinkPad options Purchasing additional servicesTelephone numbers User Guide Wireless interoperability Wireless related informationAppendix A. Regulatory information 109Usage environment and your health Location of the UltraConnect wireless antennasExport classification notice Locating wireless regulatory noticesElectronic emission notices Federal Communications Commission Declaration of ConformityGerman Class B compliance statement Appendix A. Regulatory information User Guide Important Weee information Appendix B. Weee and recycling statementsJapan recycling statements 115Recycling information for Brazil Battery recycling information for the European UnionDisposing of Lenovo computer components Appendix B. Weee and recycling statements User Guide Appendix C. Energy Star model information Power plan Energy Saver settings when plugged into ac powerClick Hardware and Sound Device Manager Network adapters 119Click OK 121 Appendix D. NoticesTrademarks Ukraine RoHS China RoHS Turkish RoHS123 India RoHS

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