Monday, May 23, 2016

MOTHERBOARD MOSFET TESTING METHOD.

MOTHERBOARD MOSFET TESTING METHOD.
 

 MOSFET is good or bad test on the motherboard 
(using resistance measurement method)

FETs of all types are widely used electronics components today. Of all the types of FET, the MOSFET is possibly the most widely used.

Even though MOSFETs have been in use for many years, these electronics components are still a very important element in today's electronics scene. Not only are MOSFETs found in many circuits as discrete components, but they also form the basis of most of today's integrated circuits.

MOSFETs provide many advantages. In particular they offer a very high input impedance and they are able to be used in very low current circuits. This is particularly important for integrated circuit technology where power limitations are a major consideration



The method of measuring resistance is measured with a multi meter FET source electrode and the drain, gate and source pole resistance value indicated by the resistance value between the gate and drain, gate G1 and the gate G2 and the MOSFET manual are consistent to distinguish good and bad of the tube. Specific methods : first placed in the multi meter R × 10 or R × 100 files,measuring the resistance between the source S and drain D, usually in the tens of ohms to thousands of Europe-wide (in the manual shows a variety of different models tube, the resistance value is not the same), if the measured resistance is greater than normal, may be due to internal poor contact; If the measured resistance is infinite, may be internally broken pole. Then placed in the multi meter R × 10k file, and then measured between the gate G1 and G2, gate and source, the resistance value between the gate and drain, when measured its various resistor values ​​are infinite, the Description tube is normal; if measured to get above the resistance is too small for the pathway, then the tube is bad. To note that the two grids is broken in the tube pole available component substitution method to detect.

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