Chapter Summary

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The following points summarize the key concepts in this chapter:


  • The three most commonly encountered types of printers are dot-matrix, ink-jet, and laser printers.
  • As a computer technician, you can expect to encounter printing problems on a regular basis.
  • Most printer problems can be resolved quickly by checking for paper jams, expended consumables, or improper use.
  • The key components of a laser printer are its power supply, photosensitive drum, eraser lamp, primary corona, laser, transfer corona, and fuser.


  • Modems convert parallel digital data to and from serial analog data.
  • Modem speeds are based on bps (bits per second).
  • CCITT (now ITU-T) establishes standards for modem communication.
  • AT commands are used to manually communicate with and test a modem.
  • Modems can be installed internally or externally.
  • The primary modem problem is IRQ conflicts.

Cables and Connectors

  • There are many different types of computer cables and connectors. It is important for the computer technician to be able to identify each of them.
  • Distinguishing between a male or a female connector is often the key to identifying the connector's function.
  • Loose or poorly connected cables are often the cause of computer problems.

Microsoft Corporation - A+ Certification Training Kit
Microsoft Corporation - A+ Certification Training Kit
Year: 2000
Pages: 127 © 2008-2017.
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