* Ports and Connectors * Serial * Male * 9 or 25-Pins * Mice * Parallel * Female * 25-Pins * Game * Female * 15-Pins * 2 rows * ***Video monitor has 15 pins but THREE ROWS * NIC * Network Interface Card * Connects CPU to Network and Internet * Converts Parallel communications to Serial * Uses an RJ-45 Connector * Modem * Connects to phone line * 56 Kbps * Converts Analog to Digital and vice-versa * RJ-11 Connector * Video * VGA * Analog Interface * D-Type * 15-Pins, 3 Rows * DVI * Digital Video Interface * S-Video * Round * 4-7 Pins * Connects to TV * USB * Universal Serial Bus * Replacing older connectors * USB1 * 12Mbps * 3 meter cable length * USB2 * 480Mbps * 5 meter cable length * A-Connector * Plugs into computer * B-Connector * Plugs into device * SUPPORTS 127 SIMULTANEOUS DEVICES*** * SCSI * Narrow SCSI * 50-pin * Type A * Wide SCSI * 68-pin * Type P * IEEE 1394 * FireWire * Serial connection * Fast * Streams Media * Was expected to replace SCSI * Multimedia * Microphone * Earphones * Speakers * All color coded * Audio Green and Blue * Microphone Pink * Video * Types of Monitors * CRT | * LCD | * Cathode ray tube | * LIQUID CRYSTAL DISPLAY | * older design | * USE THIN FILM TRANSISTOR | * similar to television screens | * - AKA ACTIVE MATRIX | * | * BACKLIGHTING THROUGH POLARIZED CHANNELS*** | * Specifications of Monitors * Screen Size * Diagonal Dimension of the Screen * Contrast Ratio*** * Ratio of purest white to purest black * Larger difference is better * Refresh Rate - CRT*** * Times per second CRT beam writes to screen * Higher amount per second is better * Response Time – LCD*** * Time needed to create a new screen * Lower time is better * Interlacing – CRT*** * Beam writes to alternating lines * Compensates for slower refresh rates * Dot Pitch – CRT*** * Distance between Phosphorescent dots * Pixel Pitch – LCD*** * Addressable Pixels on screen * Aka Resolution * Resolution – Both*** * Addressable points on screen * The different monitors support: * CRT | * LCD | * 640 x 480 * 800 x 600 * 1024 x 768 * Higher resolution = sharper picture | * Fixed Resolution * - Native Resolution**** * SHARPEST PICTURE = NATIVE RESOLUTION | * | * | * Connectors * Analog * 15-Pin * 3 Row * D-Type * Digital * DVI * S-Video Port * TV * 4-Pin * Rount
Connectors
* Analog * 15-Pin * 3 Row * D-Type * Digital * DVI * S-Video Port * TV * 4-Pin * Rount
Native Resolutions*** * XGA – 1024x768*** * SXGA – 1280x1024*** * UXGA – 1600x1200*** * WUXGA – 1920x1200***

* Configuring a Second Monitor * Need a 2nd video card * Check CMOS * Ensures screen 1 stays in control * Install 2nd card into the monitor * Click 2nd Screen in display options * Check extend desktop box * Configure settings for screen

* Video Busses * Troubleshooting * Wavy Image/Flicker * May be EMI * Electromagnetic Interference * Common Sources * Flourescent Lights * Audio Speakers
Troubleshooting
* Wavy Image/Flicker * May be EMI * Electromagnetic Interference * Common Sources * Flourescent Lights * Audio Speakers
AGP Slot * PCIe * Twice as fast * Modern motherboards: * Several PCI slots * Either AGP or PCI, not both * 2nd video card uses PCI slot * Video Cards * Buy Reputable Brand * More expensive * Better performance * Check bus type and speed * Faster is better * Check video RAM on card * More is better

* Printers * Types * Dot Matrix * Impact Printer * Cluster of pins strike an inked ribbon * Used in printing multi-part forms*** * Tractor Feed system * Slow and Noisy * Paper jams are regular * Inkjet * 2 types * Thermal Bubble * Uses heat to force ink through nozzle * Piezoelectric Technology * Uses electrical charge to force ink through nozzle * Requires wax-coated paper to prevent ink from smearing * 4 color system for color copying * CYMB * Cyan * Yellow * Magenta * Black

* Laser * Electrophotographic * Expensive to replace toner cartridges * 6-Step Laser Printing Process*** * Cleaning * Cleans toner from drum * Leaves drum with neutral charge * Conditioning * Applies a -600 volt charge to drum * Writing * Laser prints image to drum * Image is -100 volt charge * Rest is still -600 * Developing * Toner is transferred to image * Transferring * Toner is transferred to positively charged paper * Fusing * Rollers apply heat and pressure to melt toner onto the page * Problems with Laser Printers * Totally White Page * Paper is not retaining strong positive charge * Totally black page * Drum is not retaining strong negative charge * Streaking on page * Low toner * Temp-Fix: remove cartridge, rock gently, replace * Wrong paper type * Flakey or Brittle Print * Fuser may not be hot enough * Fuser may not be applying enough pressure * Garbled Text * Incorrect driver * Use manufacturer’s website to get correct driver * Printer Interfaces * * Wireless * 802.11 * IrDA * Bluetooth * Wireless * 802.11 * IrDA * Bluetooth
May be connected by * 36 – Pin Centronics * Plugs into printer * 25-Pin Parallel * Plugs into computer * USB * SCSI * Installing a Printer * Run the CD First * Installs proper drivers * Improving Performance * Add memory * Move/Delete Graphics * Lower the Resolution * **If the page only prints halfway, then stops, it’s usually a memory issue solved with 1 of the 3 recommendations above * Terms to know * Spooling * Sends print jobs to queue * Stores print jobs in memory * Frees the Operating System for other activities * Queue * List of print jobs waiting to print * Double-click the printer icon to see the queue