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25 Cards in this Set
- Front
- Back
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field replaceable unit
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the typical parts a tech should carry, such as RAM and a hard drive
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PSU
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power supply unit
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wattage
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Voltage x amperes = W
the amount of amps and volts the device needs |
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ohms
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resistance to the flow of electrons
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ground wire
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an electrical outlet must have a ground wire to be suitable for PC use
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Direct current DC
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electrons flow in one direction around a continuous circuit
most electronic devices use |
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alternating current AC
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flow of elections alternates direction back and forth in a circuit
travels long distances more efficiently |
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IEC 320 connector
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standard electrical plug
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AC switch
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flipping the switch on the back of a power supply can wreak all kinds of havoc
smoking might not start |
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multimeter
volt ohm meter |
measure a number of aspects of electrical current
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surge supressors
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surges are dangerous
absorbs extra voltage can never survive a lightning strike |
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UPS -uninterruptible power supply
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protects computer and data in the event of a power sag or outage
contains a big battery that provides AC power |
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power to the motherboard
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20 or 24 pin P1 power connector
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power to peripherals
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molex mini and SATA
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molex connectors
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most common
5 or 12 volts notches (chamfers) always check for proper orientation before plugging in |
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mini connectors
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5 and 12 volts
floppy drives extra careful when plugging in (can destroy floppy) |
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SATA power connector
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Serial ATA drives need a special 15 pin SATA power connector
3.3, 5, and 12 V L shaped |
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ATX
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motherboard power connector
soft power |
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soft power
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The BIOS or OS takes over and hangles the chore of turning the PC on or OFF
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active PFC
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active power factor correction
extra circuitry that smoothes the power and eliminates harmonics |
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missing slot covers
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can cause the PC to overheat
limits airflow |
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slowly dying power supply
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sometimes bad things happens and sometimes they dont
computer crashes after 2 hours |
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Class C fire extinguisher
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live electrical equipment
you can use ABC (multi fire ) |
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proper voltage for a US electrical outlet
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120 V
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What voltage does an ATX12Vp1 connector provide for the motherboard?
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3.3
5 12 |
