global Laptop and motherboard repair tutorial | Page 18

This is also commonly called the
―charging cordǁ and its purpose is to supply the correct amount of power to the laptop. The cord
end of the AC Adapter where it plugs into the wall outlet is the AC end of the cord, where 120 volts
are travelling through to the center inverter power box. In this inverter box, the AC current
(alternating current) is converted to DC current (direct current), then, travels to the plug tip. In this
plug tip, you will commonly find 2 main wires… The center ―powerǁ wire and the outer twisted
grounding wire (usually wrapped around the entire circumference of the cable)
Internal Speakers
All laptops will have internal
speakers, though 90% of them are not of great quality. They are there more for the ―dings and
pingsǁ and beeping noises that the default sound theme produces when browsing windows explorer or
internet explorer. They are not really meant to be blasting music from at its highest level. There are
some models, though, once again in the entertainment and gaming built series of laptops. They will
add subwoofers and tweeters and amplifiers to enhance the audio.
Audio/Headphone/Mic. – Out Port
Most all
laptops will have this set located somewhere on it. It is where you connect an external
microphone or headphones or external speaker or even an external amplifier.
Printer Port
These used to be found on each and
every laptop, but now you will rarely find these on your laptop as they are becoming outdated due
to the use of Wi-Fi, USB and Bluetooth. It is a 25 pin port and would connect a parallel/serial cable
to your printer.
The list above is the parts/components that are the most common, the ones that typically all
laptops will have… Yes, there are others not listed, but they need not be discussed in this particular
book.