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

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

Course ILT CRT monitor

Course ILT CRT components Cathode Anode Phosphors Pixel triad Electronic beam positioning –Shadow mask –Aperture grill –Slotted mask

Course ILT How CRTs produce images

Course ILT Activity A-1 Examining how CRTs produce images

Course ILT CRT characteristics Screen size Aspect ratio Resolution Refresh rate Dot pitch Flat or curved screen

Course ILT Activity A-2 Comparing monitor specifications

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

Course ILT Display properties Screen resolution Color quality Monitor settings Color depth

Course ILT Display adjustments Brightness Contrast Position of image on screen Adjustment method varies by monitor

Course ILT Activity A-3 Installing a CRT

Course ILT CRT issues Screen is black Image flickers or distorts Noisy monitor Image scrolling Video Display Troubleshooter

Course ILT Activity A-4 Troubleshooting CRT problems

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

Course ILT Flat panel monitor

Course ILT LCD advantages Less power is used Less heat is created Use less desk space Less glare Less radiation emitted

Course ILT How a flat panel screen works

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

Course ILT Flat panel monitor connections Connection types –15-pin VGA style connection cable –DVI-D –DVI-I

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

Course ILT DVI-D connector

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

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

Course ILT Touch screen Touch-sensitive surface –Pressure-sensitive resistors –Infrared sensors –Electronic capacitors Uses –PDAs –Point-of-sale terminals –Bank ATMs

Course ILT Touch screen input methods Additional layer with electrical current Capacitors between layers Acoustic waves

Course ILT Activity B-1 Examining how LCDs produce images

Course ILT Multiple monitors

Course ILT Display projectors Show computer screen to large groups Useful for meetings and classroom Connect using –VGA –S-Video –Composite –USB –Serial

Course ILT DisplayPort technology New specification developed by VESA Covers –Displays CRT LCD Plasma Projection –Connections PCs Game systems DVD players Other image sources

Course ILT Activity B-2 Installing an LCD monitor

Course ILT LCD monitor issues Indicator light colors Shaky image Fuzzy image No image Discolored image

Course ILT Activity B-3 Troubleshooting LCD problems

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

Course ILT Speakers connected to a PC

Course ILT Speakers connected together

Course ILT Activity C-1 Connecting speakers

Course ILT Microphone connection to a PC

Course ILT Activity C-2 Using a microphone

Course ILT Music keyboard connected to ⅛” jack

Course ILT MIDI connections

Course ILT Activity C-3 Connecting musical instruments to a computer

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

Course ILT Flatbed scanner

Course ILT Multifunction sheetfeed scanner

Course ILT Hand-held scanner

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

Course ILT Scanner configuration features Image type Scan mode Scan resolution Scaling Destination Image control Preview features Scan

Course ILT Scanner connections Older scanners –Slow parallel ports –SCSI devices Current scanners –USB –FireWire –All PnP-compliant Use Device Manager to update driver

Course ILT Activity D-1 Connecting a scanner

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.

Course ILT Activity D-2 Troubleshooting scanner problems

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

Course ILT Resolutions MegapixelsGood forMax print sizeFound in Under 1 MPBroadcasting over the Internet Web cameras (webcams) 1 to 2 MP ing pictures4x6 inchesCamera phones, still shot on digital video cameras, older digital cameras 3 to 4 MPPrinting, ing, 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

Course ILT Digital camera memory cards CompactFlash Memory Stick Secure Digital SmartMedia xD-Picture Card

Course ILT Digital camera memory cards (con’t)

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

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

Course ILT Memory card readers

Course ILT Activity D-3 Connecting a digital camera

Course ILT Camera connection problems Batteries Cable Camera mode Device manager

Course ILT Activity D-4 Troubleshooting digital camera connection problems

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