Thaidoweb 2008

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 [...]

If, for some reason, you can’t get an exact replacement for the transistor that you want to replace, you can refer to one of the transistor substitution guides or book, and try to identify a "near replacement". Beware, however. A substitution guide will sometimes list a replacement for your part, even though the two parts are not very similar. The most commonly used transistor substitution guides is the Philips ECG semiconductors Master Replacement Guide. Selecting the right transistor parameters or [...]