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REQUEST : How test mosfet

clalessio92

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Hi, I'm Alessio from Italy. I'm a computer repair. I have some questions on the repair process of the notebook mainboards.
There are ways to test the mosfets (eg 8-pin ones)? What tools should I use? Thank you for your remarkable availability, good day;)
 
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You get schematics and MOSFETs characteristics (tables/diagrams/graphs/etc.).
Then, you test what you get on output pins, when you do something to input pins.

Basic read schematics skills required.
Understanding how MOSFETs work can be useful as well.
 
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Mosfet are kinda lot of diodes interconnected in one box. You really need to figure out where and what comes in and goes out specific to each Mosfet ingeneers choosed. I could Do it with car relays but never with à Mosfet its complicated.
 

clalessio92

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Thanks for everyone!
Are there any guides or ebooks related to the electronic components on the common motherboards?
Thanks ;)
 
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Thanks for everyone!
Are there any guides or ebooks related to the electronic components on the common motherboards?
Thanks ;)

Yes, you will need to contact the specific vendor. Usually they sell them...
 

Aquinus

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You need a spec sheet for the particular kind of MOSFET you have, otherwise you don't know the characteristics of the device or really even what pins do what.
 
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@Aquinus yes one can if he/ she poses the knowledge and skills to reverse engineer as to figure out what goes where and how, but your starting point is the specs of said ic.
Oh and don't use soldering pistol as it will electro migrate the shit out of semiconductors (ic's, MOSFETs, IGBT's,posibly others),soldering iron or soldering station.
 
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It is easy to test to see if a MosFet has shorted if you know the pinout of the device.

This illustrates a simple test. Note this test is pretty good at identifying if a MosFet has shorted out. But it is not conclusive. That is, if the test shows the MosFet is bad, it is bad. But the test results may not identify a bad MosFet.
 
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