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Published byWalter Gaines Modified over 9 years ago
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Course ILT Video and multimedia input/output devices Unit objectives Describe, install, and troubleshoot CRT displays Describe, install, and troubleshoot LCD displays Connect and use speakers and a microphone Connect and troubleshoot scanners and digital cameras
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Course ILT Topic A Topic A: Cathode ray terminals Topic B: LCDs and other video technologies Topic C: Sound input and output devices Topic D: Scanners and cameras
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Course ILT CRT monitor
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Course ILT CRT components Cathode Anode Phosphors Pixel triad Electronic beam positioning –Shadow mask –Aperture grill –Slotted mask
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Course ILT How CRTs produce images
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Course ILT Activity A-1 Examining how CRTs produce images
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Course ILT CRT characteristics Screen size Aspect ratio Resolution Refresh rate Dot pitch Flat or curved screen
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Course ILT Activity A-2 Comparing monitor specifications
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Course ILT Video connectors PinTransmits 1Red video out 2Green video out 3Blue video out 4Monitor ID bit 2 5Ground 6Red ground/return 7Green ground/return 8Blue ground/return 9Not used 10Sync ground/return 11Monitor ID bit 0 12Monitor ID bit 1 13Horizontal sync 14Vertical sync 15Monitor ID bit 3
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Course ILT Display properties Screen resolution Color quality Monitor settings Color depth
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Course ILT Display adjustments Brightness Contrast Position of image on screen Adjustment method varies by monitor
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Course ILT Activity A-3 Installing a CRT
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Course ILT CRT issues Screen is black Image flickers or distorts Noisy monitor Image scrolling Video Display Troubleshooter
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Course ILT Activity A-4 Troubleshooting CRT problems
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Course ILT Topic B Topic A: Cathode ray terminals Topic B: LCDs and other video technologies Topic C: Sound input and output devices Topic D: Scanners and cameras
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Course ILT Flat panel monitor
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Course ILT LCD advantages Less power is used Less heat is created Use less desk space Less glare Less radiation emitted
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Course ILT How a flat panel screen works
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Course ILT Flat panel monitor characteristics Screen size Viewing angle Response rate Contrast ratio Native resolution Brightness Other features –Change orientation –Built-in speakers –Anti-theft lock –Wall mounting
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Course ILT Flat panel monitor connections Connection types –15-pin VGA style connection cable –DVI-D –DVI-I
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Course ILT DVI-D Digital-only connection Dual-link contains 24 pins in 3 rows of 8 plus a grounding slot Single-link contains 18 pins
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Course ILT DVI-D connector
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Course ILT DVI-I Supports digital and analog signals DVI-I contains 4 additional pins over DVI-D Extra 4-pins carry analog signals Analog signal pins located above and below the grounding slot
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Course ILT TMDS Transition minimized differential signaling Protocol used to transmit data to digital monitor No analog conversion Single-link cables use one TDMS transmitter Dual-link cables use two TDMS transmitters Supported resolutions –Single-link up to 1920x1080 –Dual-link up to 2048x1596
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Course ILT Touch screen Touch-sensitive surface –Pressure-sensitive resistors –Infrared sensors –Electronic capacitors Uses –PDAs –Point-of-sale terminals –Bank ATMs
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Course ILT Touch screen input methods Additional layer with electrical current Capacitors between layers Acoustic waves
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Course ILT Activity B-1 Examining how LCDs produce images
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Course ILT Multiple monitors
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Course ILT Display projectors Show computer screen to large groups Useful for meetings and classroom Connect using –VGA –S-Video –Composite –USB –Serial
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Course ILT DisplayPort technology New specification developed by VESA Covers –Displays CRT LCD Plasma Projection –Connections PCs Game systems DVD players Other image sources
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Course ILT Activity B-2 Installing an LCD monitor
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Course ILT LCD monitor issues Indicator light colors Shaky image Fuzzy image No image Discolored image
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Course ILT Activity B-3 Troubleshooting LCD problems
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Course ILT Topic C Topic A: Cathode ray terminals Topic B: LCDs and other video technologies Topic C: Sound input and output devices Topic D: Scanners and cameras
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Course ILT Speakers connected to a PC
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Course ILT Speakers connected together
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Course ILT Activity C-1 Connecting speakers
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Course ILT Microphone connection to a PC
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Course ILT Activity C-2 Using a microphone
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Course ILT Music keyboard connected to ⅛” jack
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Course ILT MIDI connections
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Course ILT Activity C-3 Connecting musical instruments to a computer
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Course ILT Topic D Topic A: Cathode ray terminals Topic B: LCDs and other video technologies Topic C: Sound input and output devices Topic D: Scanners and cameras
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Course ILT Flatbed scanner
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Course ILT Multifunction sheetfeed scanner
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Course ILT Hand-held scanner
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Course ILT TWAIN Supported by scanners and imaging applications “Never the twain shall meet” TWAIN eases scanner connection Most scanners have more full-featured software from manufacturer
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Course ILT Scanner configuration features Image type Scan mode Scan resolution Scaling Destination Image control Preview features Scan
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Course ILT Scanner connections Older scanners –Slow parallel ports –SCSI devices Current scanners –USB –FireWire –All PnP-compliant Use Device Manager to update driver
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Course ILT Activity D-1 Connecting a scanner
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Course ILT Troubleshooting Acquire information about the problem Simplify by removing any non-critical components, shut down unnecessary running programs, and disconnect from the Internet or network. Implement by identifying probable causes and implementing potential solutions one at a time. Document the error symptoms, the components you removed from the computer, and the solutions you tried and whether they were successful.
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Course ILT Activity D-2 Troubleshooting scanner problems
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Course ILT Digital cameras Connect via USB or FireWire May or may not require drivers Quality of picture expressed in megapixels Cameras available from 1 megapixel to over 8 megapixels
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Course ILT Resolutions MegapixelsGood forMax print sizeFound in Under 1 MPBroadcasting over the Internet Web cameras (webcams) 1 to 2 MPE-mailing pictures4x6 inchesCamera phones, still shot on digital video cameras, older digital cameras 3 to 4 MPPrinting, e-mailing, using on Web if you crop image 5x7 inchesMid-range, consumer-grade, digital cameras 5 to 8 MPLarge prints8x10 inches“Prosumer” digital cameras Over 8 MPProfessional use; very large prints 11x14 inches and larger Prosumer and professional grade digital cameras
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Course ILT Digital camera memory cards CompactFlash Memory Stick Secure Digital SmartMedia xD-Picture Card
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Course ILT Digital camera memory cards (con’t)
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Course ILT Printing images No film development costs Store and view photos on computer Print at home Print at store Home prints aren’t same quality as store
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Course ILT Digital camera connections Still cameras - USB Video camera – Firewire Devices run on batteries –Rechargeable –Disposable –If disposable, use digital-rated Card readers –Built-in –External device
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Course ILT Memory card readers
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Course ILT Activity D-3 Connecting a digital camera
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Course ILT Camera connection problems Batteries Cable Camera mode Device manager
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Course ILT Activity D-4 Troubleshooting digital camera connection problems
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Course ILT Unit summary Described, installed, and resolved issues with CRT displays Described, installed, and resolved issues with LCD displays Connected and used speakers and a microphone Connected and resolved issues with digital cameras and scanners
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