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Lab Exercises
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1401 Exploring USB Drivers 1402 UVCView 1403 Paging Dr Keyboard! Lab Analysis Test Key Terms Quiz
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Copyright 2007 by The McGraw-Hill Companies Click here for terms of use
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One of the most important functions in any type of computing is
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getting information (data) in and out of the computer system If it weren t for data moving in and out, your computer would be a boring (and pretty useless) device! You need two items to make input/output work on your PC: a peripheral device and a way to connect that peripheral device to your system unit The typical desktop PC comes with a number of peripherals: keyboard, mouse, monitor, printer, speakers, and often a cable that runs to a network These peripherals all come with some form of cabling/ connection system Many of these connections are unique pairings For example, a monitor uses either a 15-pin Video Electronics Standards Association (VESA) also called Video Graphics Array (VGA) connector or a Digital Video Interface (DVI) connector, whereas a sound card uses Sony/Philips Digital Interface Format (S/PDIF) or mini-RCA connectors you won t see any other device commonly using these types of connectors CompTIA wants you to have a solid understanding of these types of peripherals and their unique connections: printers using parallel connections, networks using twisted-pair cabling, monitors using VGA or DVI, and speakers using miniRCA or S/PDIF Entire chapters of this lab manual address these specific peripherals in more detail, but there s much more to the world of input/ output than just those devices The most common PC input devices are keyboards and mice Other, more exotic input devices include scanners, touch screens, and biometric readers More general-purpose connections used by many types of peripherals include serial, USB, and FireWire This chapter takes a look at those other peripherals and connections that don t really fit well into any of the other chapters
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Lab Exercise 1401: Exploring USB Drivers 217
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S 30
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MINUTES
Lab Exercise 1401: Exploring USB Drivers
USB s incredible ease of use makes it the most popular type of general-purpose connection used on PCs It is so popular that every type of peripheral (other than monitors) has someone making a USB version The downside to this ease of use is that it can be a challenge to deal with USB when it doesn t work as specified
Learning Objectives
At the end of this lab, you ll be able to Diagnose and repair common USB driver failures Recognize the limitations of built-in Windows USB device drivers
Lab Materials and Setup
The materials you need for this lab are A Windows XP system using USB At least one human-interface USB device, such as a mouse or keyboard At least one mass storage USB device, such as a USB thumb drive At least one USB device that is neither a human interface device nor a mass storage device (for example, a wired NIC, Bluetooth hub, wireless NIC, or personal digital assistant [PDA] synching cradle) A notepad and pencil to document your ndings
Getting Down to Business
The biggest problems you ll see with USB are the result of improper drivers If you know how to recognize these problems from error messages or by using third-party tools, you shouldn t have too much trouble fixing them Windows XP comes with good built-in support for what Windows calls human interface devices (HIDs), such as keyboards and mice It also does a good job supporting most USB mass storage devices, such as USB thumb drives However, once you move outside of these two classes of devices, Windows really needs the drivers supplied by the manufacturer to work properly, if at all Step 1 Connect any HID or mass storage USB device to the XP system without first installing the supplied driver Does the device work as expected Is it missing any features Does the device even come with drivers Write down your conclusions and unplug the device
218 14: Input/Output
Step 2 Check the manufacturer s Web site of the USB device you just installed to see if a driver exists If there is a driver, download it and install it into your system Now connect the device again Does the device work the same as it did before Step 3 Now select another USB device specifically, one that is neither a HID nor a mass storage device and connect it to the same system without first installing the supplied driver Does the device work as expected Is it missing any features Does the device even come with drivers Write down your conclusions and unplug the device Step 4 Check the manufacturer s Web site of the USB device you just installed to see if a driver exists If there is a driver, download it and install it into your system Did the installation work In many cases, installation will fail because Windows may have loaded an improper driver from when you first installed the device Does the device work the same as before You ll probably find that it doesn t, for the same reason Step 5 Go to the manufacturer s Web site and see how to remove the device driver properly Delete the driver and then remove the device
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