Need help with SMD CAP

[kiwimodz]

so i have found a SMD ceramic capacitor on a gaming console motherboard which i have tried to test with multimeter but im not getting anything at all every other cap i test i can get a reading ,I understand that it is not always possible to get a correct reading when still on the pcb but i thought i should be able to get something.

I have also found a SOT-23 transistor that i can not get any readings from labeled KN all other SOT-23 i can get a reading however i can not find another labeled KN so im not sure if it is just the way that one is meant to be until it has current pass through.

[chaztek]

Re: Need help with SMD CAP

What type of reading are you expecting? are you using a cap tester? or just ohm meter...
an ohm meter will only show leakage if its set high enough to read that...
trouble with testing caps in circuit with a cap tester is you may get other stray capacitance from surrounding components.. and unless a cap is obviously burned or damaged there is not easy to determine if its functioning.. at least not in circuit..
one of my pet peeves is no markings on a lot of SMD chip caps..

Chaz

[budm]

Re: Need help with SMD CAP

I am not sure how reliable this code book (pdf) is.
and this: http://www.s-manuals.com/smd

KN: http://www.s-manuals.com/smd/kn

[chaztek]

Re: Need help with SMD CAP

Hay great Budm...thanks!