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Electronics => Beginners => Topic started by: user1868 on September 29, 2020, 02:41:17 am

Title: How would I test these with a meter to see if good?
Post by: user1868 on September 29, 2020, 02:41:17 am

Theres a bunch of these but I dont have schematics for the board.

Title: Re: How would I test these with a meter to see if good?
Post by: Doctorandus_P on September 29, 2020, 02:48:08 am

There are websites for matching SMT codes to part numbers.

Without knowing what it is (BJT, FET, (TVS) diodes, etc) the simplest is to poke around in diode mode to find PN junctions. Same parts should have PN junctions over the same pins. but when testing in circuit you add extra uncertainty because of surrounding circuitry.

Another way is power the circuit up and look with a scope at signals passing these components. Do they make sense?

Title: Re: How would I test these with a meter to see if good?
Post by: bob91343 on September 29, 2020, 05:40:01 am

https://datasheet.octopart.com/BAW567-Diodes-Inc.-datasheet-115921.pdf

Title: Re: How would I test these with a meter to see if good?
Post by: Doctorandus_P on September 29, 2020, 12:01:23 pm

Give a man a fish and he can eat for a day...