Electronic Schematics Diagram-The Four Commonly Asked Questions
I came across quite a number of questions about electronic
circuit schematics diagram. Most of the question asked are: a)
Do we really need a schematic diagram in order to repair any
electronic equipment? b) Will schematic diagram help us to
repair faster? c) At where we can get a particular schematic
diagram? d) How to read schematic diagram ? Well, the answers is
as below:
a)-Theoretically yes, practically not necessary, it all depends
on how good you are in electronic repair knowledge. For a
beginner it is a 'must' for you to understand about schematic
diagram, as you gradually gained more knowledge you will
automatically depends less on schematic diagram. You will
definitely need a schematic diagram when you come across a new
designed or technology. For example, when comes to crt monitor
repair i seldom see schematic because i already understood most
of the circuitry and section in a crt monitor. The new
technology such as lcd or tft monitor makes me have to
temporarily relies on schematic diagram. As my knowledge of lcd
monitor repair grows, i will gradually depends less on the
schematics. May be my situation is different from yours because
i'm concentrating only on one type of equipment. I've seen quite
a lot of repairers in my country that repair many types of
equipment such as tv, video, vcd, dvd, amplifier, hi-fi, fax,
laser printer, microwave and so forth. Most probably they need
schematic diagram to keep them up to date on each of the
equipment technology.
b) If you have a particular schematic diagram for that
particular equipment, your troubleshooting time can be reduced
to half! Unfortunenately many manufacturer do not release their
equipment's schematic diagram. If you depends on too much of
schematic you will be stuck on how to repair that particular
equipment. Why with schematic diagram you can repair any
equipment faster? Because a schematic diagram shown you all the
part list, waveform, voltages, explanation how that particular
equipment work, block diagram, schematic design, component's
part number, electrical schematics symbols, substitution,
modification (if have) and electronic schematic symbols and etc.
Assuming you have a power supply section blown and you could not
recognize the component part number, but with schematic you will
be able to find the exact part number and finally repaired the
equipment.
c) If you work in the equipment's factory or their distributor
you will have the schematic diagram for the model that they
sell. Any under warranty unit that comes in you will be able to
diagnose and repair the equipment fast. This will increase the
company's reputation and customers will recommend to their
friends about the quick service of that particular brand of
equipment. You also can get schematic diagram in the form of a
book from local electronic shops. This is usually a compilation
of few brands and model of a specific electronic equipment. Tv
or television schematics diagram are easily to get but computer
monitor schematics and radio amplifier schematics is a little
bit harder to find. If you have the budget get one of the book.
Third, as most of us already know that you can download free
electronic schematics diagram from the internet. Free tv
schematics is easily found on the internet. You may also buy it
the 'CD' format. This investment will usually pay back in the
shortest time.
d) As how to read schematic diagram, i'm unable to show you thru
article because you do need a real schematic diagram in order to
make you understand. Reading schematic is not that difficult,
provided you have some basic electronic knowledge. I have a few
suggestions: -Ask from a friend who is in the repair line -Take
short courses on electronic repair and ask the lecturer -Buy
books from your local bookstore about the subject "how to read
schematic diagram" -Buy schematic diagram and learn on your own
(this will take sometimes but worth it) -Fix some project kit
using the electronic kit schematics given. This will add to your
knowledge also.
Conclusion-In order to become a successful electronic repairer
you must understand how to read schematic diagram.