C30-Ch1

  1. DIMM
    Dual inline memory module
  2. PSU
    • power supply unit
    • Receives and converts house current so that components inside the case can use it
    • –Most come with a dual-voltage selector switch 
    • • Allows switching input voltage from 115V to 220V
  3. SATA
    • Serial ATA standard (SATA)
    • –Used by most drives today
  4. PATA
    • Parallel ATA (PATA) – slower than SATA
    • – Also called IDE interface
    • – Uses 40-pin ribbon cable and connector
    • –Two connectors on a motherboard for two data cables 
    • – Accommodates up to four IDE devices
    • –Uses a 4-pin power connector called a  Molex power connector
  5. Floppy drive cable
    • –3.5-inch disk holding 1.44 MB of data
    • –Uses a 34-pin twisted cable
    • –Can hold up to two drives
  6. Rectifier:
    • Rectifier:
    • a device that converts AC to DC
  7. Inverter;
    • Inverter;
    • a device that converts DC to AC
  8. Transformer:
    Transformer:devices that changes the ratio of voltage to current
  9. A polarized plug
    • hot =thin
    • neutal=wide
  10. three-prong plug
    • hot        neutral
    •      ground
  11. FRU
    field replaceable unit
  12. field replaceable unit means
    • you are expected to know how to replace,
    • not how to repair it
  13. Fire extinguisher Class A
    can use water to put out fires caused by wood, paper, or other combustibles
  14. Fire extinguisher Class B
    can put out fires caused by liquids such as gasoline,kerosene, and oil
  15. Fire extinguisher Class C
    use nonconductive chemicals to put out a fire caused by electricity
  16. ESD
    Electrostatic discharge
  17. To protect against EDS
    • – Ground bracelet: also called ESD strap, antistatic wrist strap, or ESD bracelet
    •     • Attach bracelet to the computer case to ground it
    • – Ground mats: also called ESD mats 
    •    • Often used by bench technicians who repair and assemble computers at workbenches or assembly lines
    • – Static shielding bags: also called antistatic bags
    • –Antistatic gloves: also called ESD gloves
    • • Prevents ESD between you and a device when wearing
  18. ESD Rule 1
    When passing a circuit board or other component to another person, ground yourself and touch the other person







    • before
    • you pass it
  19. ESD Rule 2
    Leave components inside antistatic bags until ready to use them
  20. ESD Rule 3
    Work on hard floors, not carpet
  21. ESD Rule 4
    • Don’t work on a computer in a cold and dry 
    • atmosphere
  22. ESD Rule 5
    Remove packing tape and cellophane from around work area (materials that attract ESD)
  23. ESD Rule 6
    Keep components away from hair and clothing
  24. When working on sensitive low-voltage equipment such as a motherboard or processor:
    –Ground yourself with an anti-static grounding bracelet connected to a ground
  25. When working with power supplies, printers, and CRT monitors that contain capacitors:
    –Do not ground yourself because power can flow through you to the ground and you may get shocked
  26. Power supplies and monitors are considered
    field replaceable units
Author
slc53
ID
314505
Card Set
C30-Ch1
Description
C30-Ch1
Updated