background image

Machine Types

6008, 6010, 6019, 6062, 6064, 6065, 6066, 6067, 6068,

6069, 6071, 6072, 6073, 6074, 6075, 6076, 6077, 6078,
6079, 6081, 6082, 6086, 6087, 6088, 6089, 7103, 9011,
9012, 9013, 9014, 9018, 9019, 9071, 9087, 9088, 9089,
9096, 9160, 9162, 9163, 9164, 9172, 9174, 9181, 9182,
9193, 9194, 9196, 9303, 9304, 9323, 9325, 9326, 9330,
9967, 9970, 9978, 9979

ThinkCentre
User Guide

Содержание 6075BW3

Страница 1: ...9 6071 6072 6073 6074 6075 6076 6077 6078 6079 6081 6082 6086 6087 6088 6089 7103 9011 9012 9013 9014 9018 9019 9071 9087 9088 9089 9096 9160 9162 9163 9164 9172 9174 9181 9182 9193 9194 9196 9303 9304 9323 9325 9326 9330 9967 9970 9978 9979 ThinkCentre User Guide ...

Страница 2: ......

Страница 3: ...ThinkCentre User Guide ...

Страница 4: ...oftware and services have been developed exclusively at private expense and are sold to governmental entities as commercial items as defined by 48 C F R 2 101 with limited and restricted rights to use reproduction and disclosure LIMITED AND RESTRICTED RIGHTS NOTICE If products data computer software or services are delivered pursuant a General Services Administration GSA contract use reproduction ...

Страница 5: ...apter 5 Using the Setup Utility 31 Starting the Setup Utility program 31 Viewing and changing settings 31 Using passwords 31 Password considerations 31 User Password 32 Administrator Password 32 Setting changing and deleting a password 32 Using Security Profile by Device 32 Selecting a startup device 33 Selecting a temporary startup device 33 Selecting or changing the startup device sequence 33 Ad...

Страница 6: ...ds 59 Extended AT commands 61 MNP V 42 V 42bis V 44 commands 62 Fax Class 1 commands 63 Fax Class 2 commands 63 Voice commands 64 Appendix B Notices 67 Television output notice 68 Trademarks 68 Index 69 iv User Guide ...

Страница 7: ...figuration settings of your computer v Chapter 6 Updating system programs on page 35 provides information about updating POST BIOS and how to recover from a POST BIOS update failure v Chapter 7 Troubleshooting and diagnostics on page 39 provides information about basic troubleshooting and diagnostic tools for your computer v Chapter 8 Recovering software on page 47 provides instructions on how to ...

Страница 8: ...vi User Guide ...

Страница 9: ...rstand all the related safety information for this product Refer to the Safety and Warranty Guide that you received with this product for the latest safety information Reading and understanding this safety information reduces the risk of personal injury and or damage to your product Copyright Lenovo 2007 2009 1 ...

Страница 10: ...2 User Guide ...

Страница 11: ...n the keyboard and your hands and fingers relaxed Change the angle of the keyboard for maximum comfort by adjusting the position of the keyboard feet Viewing Distance Lower Back Support Seat Height Adjust the monitor so the top of the screen is at or slightly below eye level Place the monitor at a comfortable viewing distance usually 51 to 61 cm 20 to 24 in and position it so you can view it witho...

Страница 12: ...n cause overheating which might result in a malfunction or damage Place the computer and monitor so that nothing blocks the air vents usually 51 mm 2 in of air space is sufficient Also make sure the vented air is not blowing on someone else Electrical outlets and cable lengths The location of electrical outlets the length of power cords and cables that connect to the monitor printer and other devi...

Страница 13: ...icons v If your computer cables and connector panel have color coded connectors match the color of the cable end with the color of the connector For example match a blue cable end with a blue connector or a red cable end with a red connector Note Depending on your model type your computer might not have all of the connectors that are described in this section 1 Check the position of the voltage se...

Страница 14: ...p online help system for information about your fingerprint reader See Access Help on page 56 for instructions on how to open the online help system 3 Connect the USB mouse cable to the USB connector 4 Connect the monitor cable to the monitor connector on the computer v If you have a Video Graphics Array VGA Standard monitor connect the cable to the connector as shown Note If your model has two mo...

Страница 15: ... of the telephone cable to the telephone and the other end to the telephone connector on the back of the computer Attach one end of the modem cable to the modem connector on the back of the computer and the other end to the telephone outlet 3 In countries or regions that do not use RJ 11 telephone outlets a splitter or converter is required to attach the cables to the telephone outlet as shown at ...

Страница 16: ... listen to music or other sounds without disturbing anyone This connector might be located on the front of the computer 7 If you have powered speakers with an ac power adapter a Connect the cable that runs between the speakers if necessary On some speakers this cable is permanently attached b Connect the ac power adapter cable to the speaker c Connect the speakers to the computer d Connect the ac ...

Страница 17: ... parallel connection 5 Ethernet Use this connector to attach the computer to an Ethernet type local area network or to a cable modem Important To operate the computer within FCC limits when it is connected to an Ethernet network use a Category 5 Ethernet cable 6 MIDI joystick Use this connector to attach a joystick gamepad or a musical instrument digital interface MIDI device such as a MIDI keyboa...

Страница 18: ...omputer for a full refund The first time you start your computer follow the instructions on the screen to complete the software installation If you do not complete the software installation the first time the computer is turned on unpredictable results might occur When the installation is complete refer to the Access Help online help system to learn more about your computer See Access Help on page...

Страница 19: ... or diskettes Remember to install all device drivers after you install your operating system Installation instructions are usually provided with the device drivers Updating your antivirus software Your computer comes with antivirus software you can use to detect and eliminate viruses Lenovo provides a full version of antivirus software on your hard disk drive with a free 90 day subscription After ...

Страница 20: ...l type Internal drives v Diskette drive some models v Serial Advanced Technology Attachment SATA II internal hard disk drive v Optical drive some models Video subsystem v An integrated graphics controller for a Video Graphics Array VGA monitor v Intel Graphics Media Accelerator with dual display support ADD2 card is needed for dual display v PCI Express x16 graphics adapter connector on the system...

Страница 21: ...eatures v 25 pin Extended Capabilities Port ECP Extended Parallel Port EPP v 9 pin serial connector v Eight USB connectors two on front panel and six on rear panel v Standard mouse connector v Standard keyboard connector v Ethernet connector v VGA monitor connector v Three audio connectors line in line out and microphone on rear panel v Two audio connectors microphone and headphone on front panel ...

Страница 22: ...ity profile by device Preinstalled software Your computer might come with preinstalled software If it does an operating system device drivers to support built in features and other support programs are included Operating systems preinstalled varies by model Note Not all countries or regions have these operating systems v Microsoft Windows XP Home v Microsoft Windows XP Professional v Microsoft Win...

Страница 23: ...el type Internal drives v Diskette drive some models v Serial Advanced Technology Attachment SATAII internal hard disk drive v Optical drive some models Video subsystem v An integrated graphics controller for a Video Graphics Array VGA monitor v Intel Graphics Media Accelerator with dual display support ADD2 card is needed for dual display v PCI Express x16 graphics adapter connector on the system...

Страница 24: ...ut output features v 25 pin Extended Capabilities Port ECP Extended Parallel Port EPP v 9 pin serial connector v Eight USB connectors two on front panel and six on rear panel v Stasndard mouse connector v Standard keyboard connector v Ethernet connector v VGA monitor connector v Three audio connectors line in line out and microphone on rear panel v Two audio connectors microphone and headphone on ...

Страница 25: ... by device Preinstalled software Your computer might come with preinstalled software If it does an operating system device drivers to support built in features and other support programs are included Operating systems preinstalled varies by model Note Not all countries or regions have these operating systems v Microsoft Windows XP Home v Microsoft Windows XP Professional v Microsoft Windows Vista ...

Страница 26: ...type Internal drives v 3 5 inch half inch slim diskette drive some models v Serial Advanced Technology Attachment SATAII internal hard disk drive v Optical drive some models Video subsystem v An integrated graphics controller for a Video Graphics Array VGA monitor v Intel Graphics Media Accelerator with dual display support ADD2 card is needed for dual display v PCI Express x16 graphics adapter co...

Страница 27: ...ardware test results Input output features v 25 pin Extended Capabilities Port ECP Extended Parallel Port EPP v 9 pin serial connector v Eight USB connectors two on front panel and six on rear panel v Ethernet connector v VGA monitor connector v Three audio connectors line in line out and microphone on rear panel v Two audio connectors microphone and headphone on front panel v One eSATA connector ...

Страница 28: ...ce Preinstalled software Your computer might come with preinstalled software If it does an operating system device drivers to support built in features and other support programs are included Operating systems preinstalled varies by model Note Not all countries or regions have these operating systems v Microsoft Windows XP Home v Microsoft Windows XP Professional v Microsoft Windows Vista Operatin...

Страница 29: ...erial Advanced Technology Attachment SATAII internal hard disk drive v Optical drive some models Video subsystem v An integrated graphics controller for a Video Graphics Array VGA monitor v Intel Graphics Media Accelerator with dual display support ADD2 card is needed for dual display Audio subsystem v HD with ADI 1882 Audio Codec v Microphone and headphone connectors on the front panel v Line in ...

Страница 30: ...n Extended Capabilities Port ECP Extended Parallel Port EPP v 9 pin serial connector v Eight USB connectors two on front panel and six on rear panel v Ethernet connector v VGA monitor connector v Two audio connectors line in and line out on rear panel v Two audio connectors microphone and headphone on front panel v One eSATA connector on the rear panel 22 User Guide ...

Страница 31: ...ed software Your computer might come with preinstalled software If it does an operating system device drivers to support built in features and other support programs are included Operating systems preinstalled varies by model Note Not all countries or regions have these operating systems v Microsoft Windows XP Home v Microsoft Windows XP Professional v Microsoft Windows Vista Operating systems cer...

Страница 32: ...ature Operating at 0 3000 ft 914 4 m 10 to 35 C 50 to 95 F Non operating 40 to 60 C 40 to 140 F Humidity Operating 10 to 80 10 per hour non condensing Non operating 10 to 90 10 per hour Maximum altitude Operating 50 to 10 000 ft 15 2 to 3048 m Non operating 50 to 35 000 ft 15 2 to 10 668 Electrical input Input voltage Low range Minimum 100 V ac Maximum 127 V ac Input frequency range 50 60 Hz Volta...

Страница 33: ...ature Operating at 0 3000 ft 914 4 m 10 to 35 C 50 to 95 F Non operating 40 to 60 C 40 to 140F Humidity Operating 10 to 80 10 per hour non condensing Non operating 10 to 90 10 per hour Maximum altitude Operating 50 to 10 000 ft 15 2 to 3048 m Non operating 50 to 35 000 ft 15 2 to 10 668 m Electrical input Input voltage Low range Minimum 100 V ac Maximum 127 V ac Input frequency range 50 60 Hz Volt...

Страница 34: ...Air temperature Operating at 0 3000 ft 914 4 m 10 to 35 C 50 to 95 F Non operating 40 to 60 C 40 to 140 F Humidity Operating 10 to 80 10 per hour non condensing Non operating 10 to 90 10 per hour Maximum altitude Operating 50 to 10 000 ft 15 2 to 3048 m Non operating 50 to 35 000 ft 15 2 to 10 668 m Electrical input Input voltage Low range Minimum 100 V ac Maximum 127 V ac Input frequency range 50...

Страница 35: ...ating at 0 3000 ft 914 4 m 10 to 35 C 50 to 95 F Non operating 40 to 60 C 40 to 140 F Humidity Operating 10 to 80 10 per hour non condensing Non operating 10 to 90 10 per hour Maximum altitude Operating 50 to 10 000 ft 15 2 to 3048 Non operating 50 to 35 000 ft 15 2 to 10 668 m Electrical input Input voltage Low range Minimum 100 V ac Maximum 127 V ac Input frequency range 50 60 Hz Voltage switch ...

Страница 36: ...28 User Guide ...

Страница 37: ...perating system will not start ThinkVantage Client Security Solution This unique hardware software combination is available on select Lenovo computers It helps protect your information including vital security information like passwords encryption keys and electronic credentials while guarding against unauthorized user access to data ThinkVantage System Update ThinkVantage System Update is a softw...

Страница 38: ...alled from the factory on your hard disk drive PC Doctor for Windows works through the Windows operating system to diagnose hardware problems and report operating system controlled settings that can cause hardware failures Adobe Acrobat Reader Adobe Acrobat Reader is a tool used to view print and search PDF documents See Online Books folder on page 55 for more information about accessing the onlin...

Страница 39: ... might start automatically when POST detects that hardware has been removed or new hardware has been installed in your computer Viewing and changing settings The Setup Utility program menu lists items that identify system configuration topics To view or change settings see Starting the Setup Utility program When working with the Setup Utility program menu you must use the keyboard The keys used to...

Страница 40: ...hange any configuration settings you must use your administrator password Setting changing and deleting a password To set change or delete a password do the following Note A password can be any combination of up to twelve characters A Z a z and 0 9 For more information see Password considerations on page 31 1 Start the Setup Utility program See Chapter 5 Using the Setup Utility on page 31 2 From t...

Страница 41: ...e Menu does not display using this method repeatedly press and release the F12 key rather than leaving it pressed when turning on the computer 3 Select the desired startup device from the Startup Device Menu and press Enter to begin Note Selecting a startup device from the Startup Device menu does not permanently change the startup sequence Selecting or changing the startup device sequence To view...

Страница 42: ...ng system other than Windows XP your computer performance might be degraded Therefore you should always set HyperThreading to Disabled unless you are sure your operating system supports HyperThreading Exiting from the Setup Utility program After you finish viewing or changing settings press Esc to return to the Setup Utility program menu you might have to press Esc several times If you want to sav...

Страница 43: ...nstructions for using the POST BIOS updates are available in a txt file that is included with the update files For most models you can download either an update program to create a system program update flash diskette or an update program that can be run from the operating system Note You can download a self starting bootable CD image known as an iso image of the diagnostics program from http www ...

Страница 44: ...OS update failure Attention If an interruption occurs during a POST BIOS update flash update the computer might not restart correctly If this occurs perform the following procedure also known as a Boot block recovery Note If your computer has no internal diskette drive an optional USB diskette drive must be connected to use the BIOS flash diskette 1 Turn off the computer and any attached devices s...

Страница 45: ...1 and pin 2 13 Remove the BIOS flash diskette from the diskette drive 14 Close the computer cover and reconnect the power cords for the computer and monitor to electrical outlets 15 Turn on the computer to restart the operating system Chapter 6 Updating system programs 37 ...

Страница 46: ...38 User Guide ...

Страница 47: ...r of the computer v The monitor power cord is plugged into the monitor and into a working electrical outlet v The monitor is turned on and the brightness and contrast controls are set correctly v The voltage is set to the correct setting for your country v The monitor signal cable is securely connected to the monitor and to the monitor connector on the computer Note If your computer has two monito...

Страница 48: ...ranty information that is provided with your computer for a list of service and support telephone numbers The computer beeps multiple times before the operating system starts Verify that no keys are stuck down If you cannot correct the problem have the computer serviced Refer to the safety and warranty information that is provided with your computer for a list of service and support telephone numb...

Страница 49: ... the Windows operating system Use PC Doctor for DOS if you are unable to start the Windows operating system or if PC Doctor for Windows has not been successful in isolating a possible problem You can run PC Doctor for DOS from a diagnostic CD image or diagnostic diskettes that you create You can also run PC Doctor for DOS from the Rescue and Recovery workspace Note Be sure to create a diagnostic C...

Страница 50: ...art the computer Note If the diagnostic program does not start the optical drive or diskette drive has not been set as a bootable device See Selecting a startup device on page 33 for instructions on how to select or change the startup device 5 When the diagnostics program opens follow the instructions on the screen Note If you are running diagnostics from a diskette when prompted remove the first ...

Страница 51: ...lect Diagnose hardware 5 The diagnostic program opens automatically Select the diagnostic test you want to run Press the F1 key for additional help 6 Follow the instructions on the screen Note Rescue media includes PC Doctor for Windows PE For more information about rescue media see Creating and using rescue media on page 50 Cleaning the mouse This section provides instructions on how to clean an ...

Страница 52: ...en turn the mouse right side up so that the retainer ring and ball fall out into your hand 5 Wash the ball in warm soapy water then dry it with a clean cloth 6 Blow air carefully into the ball cage 4 to dislodge dust and lint 7 Look for a build up of dirt on the plastic rollers 3 inside the ball cage This build up usually appears as a stripe running across the middle of the rollers 8 If the roller...

Страница 53: ...11 Reconnect the mouse cable to the computer 12 Turn your computer back on Chapter 7 Troubleshooting and diagnostics 45 ...

Страница 54: ...46 User Guide ...

Страница 55: ... to restore the contents of the hard disk drive to the same state as when the computer was originally shipped from the factory Product Recovery discs are useful if you transfer the computer to another area sell the computer recycle the computer or as a last resort put the computer in an operational state after all other methods of recovery have failed As a precautionary measure it is important to ...

Страница 56: ...n see Setting a rescue device in the startup sequence on page 53 4 In the Rescue and Recovery menu click Restore your system 5 Follow the instructions on the screen Insert the appropriate Product Recovery disc when prompted Note After restoring your hard disk drive to the original factory content you might have to reinstall some software or drivers See Using the Rescue and Recovery workspace on pa...

Страница 57: ...ue and Recovery workspace The Rescue and Recovery workspace resides in a protected hidden area of your hard disk drive that operates independently from the Windows operating system This enables you to perform recovery operations even if the Windows operating system cannot be started You can perform the following recovery operations from the Rescue and Recovery workspace v Rescue files from your ha...

Страница 58: ...ue files from your hard disk drive or from a backup click Rescue files then follow the instructions on the screen v To restore your hard disk drive from a Rescue and Recovery backup or to restore your hard disk drive to the factory contents click Restore your system then follow the instructions on the screen v For information about other features of the Rescue and Recovery workspace click Help Not...

Страница 59: ...art from that drive When the rescue media starts the Rescue and Recovery workspace opens Help for each feature is available from the Rescue and Recovery workspace If your rescue media fails to start you might not have your rescue device CD drive DVD drive or USB device set correctly in your BIOS startup sequence For more information see Setting a rescue device in the startup sequence on page 53 Cr...

Страница 60: ... devices The latest device drivers for factory installed devices also are available on the World Wide Web at http www lenovo com think support To reinstall a device driver for a factory installed device do the following 1 Start your computer and operating system 2 Use Windows Explorer or My Computer to display the directory structure of your hard disk drive 3 Open the C SWTOOLS folder 4 Open the D...

Страница 61: ...e Setup Utility on page 31 Solving recovery problems If you are unable to access the Rescue and Recovery workspace or the Windows environment you can v Use your rescue media CD DVD or USB hard disk drive to start the Rescue and Recovery workspace See Creating and using rescue media on page 50 for details v Use a Recovery Repair diskette to repair the Rescue and Recovery workspace or repair a file ...

Страница 62: ...54 User Guide ...

Страница 63: ... computer The publications also are available on the Lenovo Web site at http www lenovo com Notes 1 These publications are in Portable Document Format PDF format which requires Adobe Acrobat Reader to be installed If Adobe Acrobat Reader has not yet been installed on your computer a message will appear when you attempt to view the PDF file and you will be guided through the Adobe Acrobat Reader in...

Страница 64: ... information on safety and warranty notices Read and understand all safety information before using this product www lenovo com The Lenovo Web site www lenovo com provides information and services to help you buy upgrade and maintain your computer You can access up to date information for your computer on the Lenovo Web site From the www lenovo com Web site you can also v Shop for Desktop and note...

Страница 65: ...n is necessary to fix the problem v Hardware repair If the problem is caused by hardware under warranty trained service personnel are available to provide the applicable level of service v Engineering Change management There might be changes that are required after a product has been sold Lenovo or your reseller will make selected Engineering Changes ECs available that apply to your hardware These...

Страница 66: ...n countries might not be able to service all models of a particular machine type In some countries fees and restrictions might apply at the time of service To determine whether your computer is eligible for International Warranty Service and to view a list of the countries where service is available go to http www lenovo com support click Warranty and follow the instructions on the screen For tech...

Страница 67: ...quires one it is just like specifying a parameter of 0 Example ATH ENTER Basic AT commands In the following listings all default settings are printed in bold text Command Function A Manually answer incoming call A Repeat last command executed Do not precede A with AT or follow with ENTER D_ 0 9 A D and L last number redial P pulse dialing Note Pulse dialing is not supported for Australia New Zeala...

Страница 68: ...turn to Data Mode O1 Return to Data Mode and initiate an equalizer retrain P Set Pulse dial as default Q_ Q0 Modem sends responses Sr Read and display value in register r Sr n Set register r to value n n 0 255 T Set Tone Dial as default V_ V0 Numeric responses V1 Word responses W_ W0 Report DTE speed only W1 Report line speed error correction protocol and DTE speed W2 Report DCE speed only X_ X0 H...

Страница 69: ...low control M_ M0 Asynchronous operation P_ P0 US setting for off hook to on hook ratio P1 UK and Hong Kong off hook to on hook ratio P2 Same as P0 setting but at 20 pulses per minute P3 Same as P1 setting but at 20 pulses per minute R_ R0 Reserved R1 CTS operates per flow control requirements S_ S0 Force DSR Signal High ON S1 DSR off in command mode on in on line mode T_ T0 Ends test in progress ...

Страница 70: ... Parameter b specifies automode operations where 0 automode disabled 1 automode enabled with V 8 V 32 Annex A Parameter c specifies the minimum connection data rate 300 56000 Parameter d specifies the maximum connection rate 300 56000 Parameter e specifies the codec type 0 Law and 1 A Law Parameter f specifies robbed bit signaling detection 0 detection disabled 1 detection enabled MNP V 42 V 42bis...

Страница 71: ... Set the polled station identification FCIG Report the polled station identification FCR Capability to receive FCR Capability to receive FCSI Report the called station ID FDCC DCE capabilities parameters FDCS Report current session FDCS Current session results FDIS Report remote capabilities FDIS Current sessions parameters FDR Begin or continue phase C receive data FDT Data transmission FDTC Repo...

Страница 72: ...ufacturer REV Identify Revision Level TL Audio output transmit level VBQ Query Buffer Size VBS Bits per sample ADPCM or PCM VBT Beep Tone Timer VCI Identify Compression Method VLS Voice line select VRA Ringback goes away timer VRN Ringback never came timer VRX Voice Receive Mode VSDB Silence deletion tuner VSK Buffer skid setting VSP Silence detection period VSR Sampling rate selection VSS Silence...

Страница 73: ...s not have Taxsignal switched OFF modem function may be impaired The impairment may be resolved by a filter with the following specifications Telekom PTT SCR BE Taximpulssperrfilter 12kHz PTT Art 444 112 7 Bakom 93 0291 Z N Appendix A Manual modem commands 65 ...

Страница 74: ...66 User Guide ...

Страница 75: ...formation could include technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication Lenovo may make improvements and or changes in the product s and or the program s described in this publication at any time without notice The products described in this document are not intended for use...

Страница 76: ...ogy must be authorized by Macrovision Corporation and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation Reverse engineering or disassembly is prohibited Trademarks The following terms are trademarks of Lenovo in the United States other countries or both Lenovo The Lenovo logo Rescue and Recovery ThinkCentre ThinkVantage The following te...

Страница 77: ...alling 52 recovering 52 diagnostic CD image 10 42 creating 41 diskettes 10 41 42 creating 41 PC Doctor for DOS 40 41 diagnostic continued PC Doctor for Windows 40 41 PC Doctor for Windows PE 40 43 programs 40 Rescue and Recovery workspace 42 43 running diskettes 42 running CD image 42 diagnostics 39 diagnostics programs using 57 disc creating product recovery 47 diskette creating and using a recov...

Страница 78: ...vity center ThinkVantage 55 programs updating system 35 purchasing additional services 58 R recovering device drivers 52 from a POST BIOS update failure 36 software 47 recovery boot block 36 operations backup and 48 problems solving 53 repair diskette creating and using 51 workspace rescue and 49 Rescue and Recovery 47 rescue and recovery workspace 49 rescue device starting 53 rescue media creatin...

Страница 79: ...d 32 using diagnostic programs 57 documentation 57 other services 58 passwords 31 recovery repair diskette creating and using 51 rescue media creating and 50 Setup Utility 31 utility program starting 31 V video subsystem 12 15 18 21 viewing and changing settings 31 voice commands 64 W warranty information 56 web site Lenovo 56 workspace arranging 3 workspace backup and recovery 49 Index 71 ...

Страница 80: ...72 User Guide ...

Страница 81: ......

Страница 82: ...Part Number 43C6566 Printed in USA 1P P N 43C6566 ...

Отзывы: