Chapter 5: Power supplies, Display Devices, and Periherals Flashcards
Volt
Measurement of the pressure of electrons
Watt
Measurement of the actual power delivered
Amp
Measurement of flow rate of electrons through a wire
What does a power supply do
Converts AC voltage into DC voltage
What is the range of power supply units and how are they measured
Power supply for desktop computers range up to 1200 watts, measured in watts
What is an AC adapter
Form of power supply used with portable computers and external peripherals
What’s the characterisitic of an ATX- power supply
Uses a 20-pin (p1) connector
What is a video adapter
Controls the output from the PC to the display device, may be built into a motherboard or may be a separate board that plugs into PCI, AGP, or PCIe connector
What are some display connectors
DB-15 (VGA), DVI, HDMI, Displayport, Composite Video, and Component video
Common electronic PC’s use what type of cables
Straight, Twisted, and coaxial
What are the two most common displays types for PC’s
CRT, FPD; FPD’s have largely replaced CRT
What kinds of lighting technology does and FPD use
LCD, LED, or plasma; tablets use OLED AMOLED
What are the most common types of output devices
Displays, Printers, and Sound Cards
What is a KVM switch
Allows a single person using one keyboard, video display, and pointing device to control many computers
What should a technician never use when working with a PSU
An anti static wrist band