103b bj 2012

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Angeli Ylanan-Agarwala's CSC 103 Demolition Lab

During this lab, we were asked to take apart a PC (Personal Computer) and learn more about its interior components. With the help of picture taking and close analysis of each components' job, we were able to take note of the inner workings of a PC. My group members Diane Rhim, Jessica Lim, and me (Angeli Ylanan-Agarwala) had a wonderful time partaking in this lab whilst learning about a PC.


  • Location: The battery is located directly attached to the motherboard.

  • Purpose: According to Wikipedia, a backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers. Small backup batteries may be primary cells; rechargeable backup batteries are kept charged by the prime power supply.

(in Wikipedia. Retrieved Feb. 21 2012, from http://en.wikipedia.org/wiki/Backup_battery).



  • Location: The cables were located throughout the PC.

  • Purpose: The cables are meant to generate power and distribute the converted power amongst the PC.


Computer Make.jpg
  • Make: Dell
  • Model Number: DHS
  • Serial Number: 4Y2LL51
  • Manufacturing Date: 082904
  • Parts Visible when Cover is Removed:
    • 1. Cables
    • 2. CD/DVD Drive
    • 3. Crystals
    • 4. Fan
    • 5. Hard Drive
    • 6. Motherboard
    • 7. Power Supply
    • 8. RAM (Random Access Memory)

CD/DVD Drive

  • Location: The CD/DVD player is located next to the hard disc drive.

  • CD or DVD Player? BOTH

  • Purpose: / Wikipedia states that, an optical disc drive (ODD) is a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical discs. Some drives can only read from discs, but recent drives are commonly both readers and recorders, also called burners or writers. Compact discs, DVDs, and Blu-ray discs are common types of optical media which can be read and recorded by such drives. Optical drive is the generic name; drives are usually described as "CD" "DVD", or "Blu-Ray", followed by "drive", "writer", etc. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Optical_disc_drive).



  • Location: Our PC had two crystals located on the motherboard. Both near the RAMs, one was closer to the fan.

Purpose: This frequency is commonly used to keep track of time (as in quartz wristwatches), to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Crystal_oscillator).

Hard Disc


Location: Next to the CD/DVD drive.

  • GB of data it holds: This disc can hold 40 GB of data.

  • Purpose: According to Wikipedia, a hard disk drive (HDD; also hard drive, hard disk, or disk drive) is a device for storing and retrieving digital information, primarily computer data. It consists of one or more rigid (hence "hard") rapidly rotating discs (often referred to as platters), coated with magnetic material and with magnetic heads arranged to write data to the surfaces and read it from them. (in Wikipedia. Retrieved Feb. 21 2012, from http://en.wikipedia.org/wiki/Hard_disk_drive).

  • Inside Hard Disc:
    • 1. Platter
    • 2. Spindle
    • 3. Head
    • 4. Actuator Arm
    • 5. Actuator Axis
    • 6. Power Connector
    • 7. Jumper Block
    • 8. IDE connector
    • 9. Actuator


Motherboard bj.jpg

  • Location: The Motherboard can be found next to the power supply and underneath the Processor.

  • What are those lines?: The lines seen throughout are called circuits.

  • Purpose: According to Wikipedia A motherboard provides the electrical connections by which the other components of the system communicate and it also connects the central processing unit and hosts other subsystems and devices. A motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system, providing connectors for other peripherals. The motherboard is sometimes alternatively known as the mainboard, system board, or logic board. (in Wikipedia. Retrieved Feb. 19 2012, from http://en.wikipedia.org/wiki/Motherboard)

Power Supply


  • Location: The power supply is located by the plug and is attached next to the motherboard.

  • Power Output: 5 V --- 210 watts

  • Purpose: According to [1], a power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of the computer. Modern personal computers universally use a switched-mode power supply. Some power supplies have a manual selector for input voltage, while others automatically adapt to the supply voltage. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Computer_power_supply).



  • Brand: Intel

  • Location: The processor of a PC is attached to the motherboard and located underneath the fan since it generates heat. This prevents the processor from overheating.

  • Model: Pentium L422B070

  • Operating Speed: 2.80 GHz

  • Purpose: As mentioned on Wikipedia, "The processor acts as the brain of the computer. It analyzes and follows through with the data that is given to it. It performs all the necessary operations and calculations (inputs/outputs) necessary for the computer to run. The processor operates on numbers and symbols represented in the binary numeral system." (in Wikipedia. Retrieved Feb. 19 2012, from http://en.wikipedia.org/wiki/Microprocessor)

RAM (Random Access Memory)

  • Location: The RAM is located on the Motherboard.

  • RAM in PC: 2 RAMS-- 512MB

  • Company: Nanya

  • Purpose: According to Wikipedia Random access memory (RAM) is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order with a worst case performance of constant time. RAM is often associated with volatile types of memory (such as DRAM memory modules), where its stored information is lost if the power is removed. Many other types of non-volatile memory are RAM as well, including most types of ROM and a type of flash memory called NOR-Flash. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/RAM).

To Conclude..


At the end of the lab, we made our professor's job easier by putting the PC back together. Since we had a bit more time left, my group members and I decided to take apart a Mac, to see the difference between the two. What an interesting sight!