Computer Repair Chapter 5
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Questions and Answers

What should be done before accessing internal parts of a laser printer?

  • Ensure the printer is powered on.
  • Clean all external surfaces of the printer.
  • Remove all paper from the printer.
  • Ensure the printer is powered off and cooled down. (correct)

    • Which of the following are essential steps to follow when reassembling a computer?

  • Install the operating system and necessary drivers.
  • Ensure the components are properly aligned and secured. (correct)
  • Check for software updates and install them if necessary.
  • Test the internet connection and network connectivity.

    • What is the main function of a computer power supply?

  • Manage the flow of information between different computer components.
  • Process and execute instructions from software.
  • Store data and programs.
  • Convert AC to DC and distribute power to components. (correct)

    • What does "ATX" stand for in relation to a power supply?

    <p>Advanced Technology eXtended. (C)</p> Signup and view all the answers

    What types of devices should be cleaned regularly to maintain optimal performance?

    <p>All of the above. (D)</p> Signup and view all the answers

    What is the purpose of the fan inside a computer's power supply?

    <p>To cool down the power supply unit. (C)</p> Signup and view all the answers

    What is the most important safety measure to take when working with a computer power supply?

    <p>Ensure the power supply is unplugged before working on it. (C)</p> Signup and view all the answers

    What is a key aspect of written communication skills outlined in the content?

    <p>Employing proper grammar, punctuation, and capitalization (D)</p> Signup and view all the answers

    Which of the following guidelines is NOT recommended for effective email communication, as stated in the content?

    <p>Include all relevant individuals in the email, even if they are not directly involved. (C)</p> Signup and view all the answers

    Which of the following is NOT a symptom of a power supply problem?

    <p>The computer successfully boots but does not power on after shutdown (C)</p> Signup and view all the answers

    What is one of the common mistakes listed in the content regarding written communication skills?

    <p>Failing to provide updates on the status of a problem. (D)</p> Signup and view all the answers

    What is the main difference between an ATX12V version 2 power supply and an ATX12V version 1 power supply?

    <p>Version 2 has a 24-pin motherboard connector instead of a 20-pin connector (D)</p> Signup and view all the answers

    Which of these is NOT a good guideline for writing an email, as stated in the content?

    <p>Focus solely on the task at hand, disregarding any additional information. (A)</p> Signup and view all the answers

    According to the content, when might it be necessary to disassemble a computer?

    <p>To install a new graphics card, which requires access to the motherboard. (C)</p> Signup and view all the answers

    What is the purpose of a surge suppressor?

    <p>To protect against overvoltage (C)</p> Signup and view all the answers

    What is the purpose of a line conditioner?

    <p>To condition the AC voltage from the wall (B)</p> Signup and view all the answers

    What is the main reason why disassembling a computer can be necessary for diagnosis?

    <p>To identify and isolate the source of a hardware malfunction. (D)</p> Signup and view all the answers

    What is the purpose of a UPS?

    <p>To provide power during an outage (A)</p> Signup and view all the answers

    Which of the following is NOT a common reason for disassembling a computer?

    <p>To install a new operating system. (C)</p> Signup and view all the answers

    What is electrostatic discharge (ESD) and why is it a concern when working on computers?

    <p>ESD is a static charge that can damage sensitive computer components. It is a significant concern when working on computers. (D)</p> Signup and view all the answers

    Which of the following is NOT a power supply form factor?

    <p>Proprietary (B)</p> Signup and view all the answers

    What POST code indicates a power supply problem?

    <p>02X (C)</p> Signup and view all the answers

    What are the ideal humidity levels to mitigate the threat of ESD?

    <p>Between 45 and 55 percent (C)</p> Signup and view all the answers

    What should you do when removing adapters from a computer?

    <p>Place removed adapters inside a special ESD protective bag. (A)</p> Signup and view all the answers

    Which of the following is a type of electrical noise that can negatively affect computers?

    <p>RFI (Radio Frequency Interference) (D)</p> Signup and view all the answers

    What is the main purpose of using an anti-static wrist strap?

    <p>To ground the user and reduce the risk of ESD. (D)</p> Signup and view all the answers

    Which of the following tools is NOT considered a basic tool commonly used for computer repairs?

    <p>Soldering iron (D)</p> Signup and view all the answers

    Why should you avoid touching the gold contacts on the bottom of adapters?

    <p>They potentially carry electrical charges and can be dangerous to touch. (A)</p> Signup and view all the answers

    Which of the following tools should you NOT leave the office without?

    <p>A set of small and medium flat-tipped screwdrivers (C)</p> Signup and view all the answers

    What should you do if you suspect EMI from a power outlet is affecting your computer?

    <p>Move the computer to a different wall outlet or circuit. (D)</p> Signup and view all the answers

    Flashcards

    Qualities of a Good Technician

    Essential soft skills needed for effective tech work.

    Written Communication Skills

    Skills needed to communicate effectively in writing.

    Effective Email Communication

    Guidelines to ensure clear and purposeful emails.

    Avoiding Documentation Mistakes

    Common errors to avoid for proper documentation.

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    Electrostatic Discharge (ESD)

    Static electricity that can damage electronic components.

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    Importance of Updates

    Keeping stakeholders informed about status and processes.

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    Good Email Practices

    Steps to write clear and concise email messages.

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    Disassembly Techniques

    Methods for diagnosing problems by taking apart computers.

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    ATX Power Supply

    Standard form factor for power supplies in desktop computers.

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    ATX12V Version 2

    Power supply standard with a 24-pin connector for motherboards.

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    Micro-ATX Power Supply

    A smaller version of the ATX power supply for compact cases.

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    Symptoms of Power Supply Problems

    Indications that a power supply may be failing.

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    POST Errors

    Power-On Self-Test errors indicating power supply issues.

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    Surge Suppressor

    Device that protects equipment from voltage spikes.

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    Line Conditioner

    Device that stabilizes AC voltage for computers.

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    UPS (Uninterruptible Power Supply)

    Provides backup power during outages and conditions voltage.

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    Computer Maintenance

    Cleaning a computer to prevent dust and dirt buildup.

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    Disassembly Steps

    Sequential actions to safely take apart a computer.

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    Reassembly

    Putting back together the components of a computer after disassembly.

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    Power Supply Function

    Device that converts AC to DC and powers internal components.

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    Power Supply Form Factors

    Different shapes and sizes of power supplies including ATX and micro-ATX.

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    Handling CRT Monitors

    Avoid disassembling without proper training and tools.

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    Internals Care

    Remove internal cables and ensure devices are securely connected during reassembly.

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    Cleaning Schedule

    Frequency of cleaning a computer in a normal environment.

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    Proper Lifting Techniques

    Methods to lift objects safely to avoid injury.

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    Anti-static Wrist Strap

    A strap that grounds the user to prevent ESD damage.

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    Humidity Level for ESD Prevention

    Keeping humidity between 45-55% to reduce ESD risk.

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    Electromagnetic Interference (EMI)

    Noise caused by electrical devices that disrupts other electronics.

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    Radio Frequency Interference (RFI)

    Noises occurring in the radio frequency range that affect electronics.

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    Basic Tools for Repairs

    Essential tools needed for 95% of repairs: screwdrivers and pliers.

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    Disassembly Best Practices

    Steps to follow while dismantling devices, like proper grounding and taking notes.

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    Study Notes

    Chapter 5: Disassembly and Power

    • This chapter covers qualities of a good technician, disassembly and static electricity, tools needed for working on computers, reassembly, power supply basics, and power protection.

    Qualities of a Good Technician

    • "Soft skills" are essential, meaning communication, documentation, and other interpersonal skills are vital.

    Written Communication Skills

    • Email: Avoid email when a meeting or phone call is better. Include a clear subject line. Don't write emails when angry. Keep emails to appropriate recipients. Stick to the point. Use a spelling and grammar checker.
    • General: Avoid delayed or inaccurate documentation. Improve spelling, grammar, capitalization, and punctuation. Use clear, concise language. Provide updates on problem status.

    Disassembly and Electrostatic Discharge

    • Disassembly may be necessary to diagnose a problem.
    • Remove jewelry.
    • Use proper lifting techniques.
    • Maintain humidity between 45-55% for ESD.
    • Use an anti-static wrist strap, avoiding use on CRT monitors or power supplies.
    • Anti-static bags protect parts.

    EMI (Electromagnetic Interference)

    • EMI/EMR (electromagnetic radiation) noise is caused by electrical devices.
    • Many devices generate EMI, including computers, pencil sharpeners, vacuums, air conditioners, and fluorescent lighting.
    • RFI (radio frequency interference) is a specific type of EMI that negatively affects computers.

    RFI (Radio Frequency Interference)

    • RFI occurs in the radio frequency range.
    • Check surrounding devices for RFI source, such as a pencil sharpener when the computer only functions with it on.
    • Move the computer to a different outlet or circuit if the problem originates from the power source.
    • RFI can affect hard drive files.

    Tools

    • Tools divide into two categories: those needed to leave the office without, and those handy, but not essentials, to have at the office, home, or car.
    • Common necessary tools include a variety of screwdriver sizes/types (flathead/Phillips), hex drivers, diagonal cutters, and needle-nose pliers.

    Disassembly

    • Don't remove the motherboard battery or the CMOS configuration.
    • Use proper grounding techniques.
    • Keep necessary tools, writing materials, a phone, and a camera near for note-taking, diagramming, and photography.
    • Have a clean, flat workspace for assembly.
    • Don't stack parts.
    • Place removed parts in special ESD protective bags.

    Disassembly Notes (continued)

    • Handle adapters, motherboards, or processors carefully, avoiding the gold contacts.
    • Hard drives need special handling; small jolts can damage stored data.
    • Don't disassemble CRT monitors or power supplies without proper training.
    • Label screw and cable locations.

    Disassembly Basic Steps

    • Step 1: Remove Power and External Cables
    • Step 2: Open the Case
    • Step 3: Remove Internal Cables and Connectors
    • Step 4: Remove Adapters
    • Step 5: Remove Storage Devices
    • Step 6: Remove Motherboard

    Reassembly

    • Be cautious and use diagrams from disassembly.
    • Place parts in proper places.
    • Don't forget screws.
    • Be sure to use the proper installation procedure reversing the steps used during disassembly.
    • Securely seat all parts and replace retaining clips/screws.

    Reassembly (continued)

    • Ensure ports and I/O shields are securely aligned with the case.
    • Ensure cables are securely attached to devices and to the motherboard's connectors.
    • Ensure that power cables are correctly attached.

    Preventive Maintenance

    • Regular (annual) cleaning is necessary.
    • Vacuum the computer, optical drive laser, keyboard, and display screen.
    • Shut down devices and remove power cords, batteries, and adapters before accessing internal parts.
    • Ensure adequate ventilation.

    Power Supply

    • The power supply is a crucial computer component. Without it, internal devices won't work.

    Power Supply Overview

    • The power supply converts AC to DC.
    • It distributes DC power to components.
    • It provides cooling via a fan.
    • The AC voltage accepts typically 100-120V or 200-240V.

    Power Supply Form Factors

    • Power supplies come in different shapes and sizes.
    • Today's power supply form factors are ATX, ATX12V v1.x, ATX12V v2.x, and micro-ATX.
    • ATX allows transferring voltage to the motherboard.
    • ATX12V version 2 has a 24-pin instead of a 20-pin connector.
    • Micro-ATX is smaller than full-sized ATX.
    • Laptop power supplies are typically proprietary.

    ATX Power Supply Connectors

    • Connectors include 20/24-pin main power connectors, Molex, 4/8-pin 12V, and 6/8-pin PCIe (Peripheral Component Interconnect Express).

    Auxiliary Fans - Air Flow

    • Proper fan positioning is critical to ensure air flow and cooling.
    • Two fans opposing each other creates resistance.

    Sample Computer Component Power Requirements

    • A table listing typical power requirements for various components (motherboard, processor, hard drives, etc.).

    Symptoms of Power Supply Problems

    • A list of symptoms indicating potential power supply issues.
    • Includes the power light not being on, or other issues such as continuous or repeating beeps during startup.

    Symptoms of Power Supply Problems (Continued)

    • Other symptoms include a burnt smell, excessive heat, or no operation from other devices.
    • Error codes during POST (Power On Self Test) can result from power errors.

    Power Protection

    • Computers require a regulated AC supply converted to DC power.
    • Protection includes surge suppressors to prevent voltage spikes.
    • Line conditioners regulate the AC voltage.
    • UPS (Uninterruptible Power Supplies) provide protection during outages and voltage control.
    • SPS (Surge Protection Supplies) typically provides power during an outage.

    Computer Terms

    • Review the glossary for defined computer terms used in Chapter 5.

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    Related Documents

    Disassembly and Power Chapter 5 PDF

    Description

    This quiz covers Chapter 5, focusing on disassembly techniques, the importance of soft skills in technology, and understanding power supply basics. Assess your knowledge on the tools required for computer servicing and effective communication methods. Prepare yourself for real-world applications of these essential technician qualities.

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