Author Topic: Testing question (Read 1709 times)

ecu971 · « **on:** July 06, 2014, 01:26:18 pm »

How can i test smal (mos)fet:s in circuit? They are a little to smal to remove with hot air.

homebrew · « **Reply #1 on:** July 06, 2014, 01:32:54 pm »

That highly depends on the circuit. Give us a little more context. Maybe a schematic ...

ecu971 · « **Reply #2 on:** July 06, 2014, 01:47:23 pm »

Im diagnose a power supply for a led tv. Have tested all "big" components. On the backside there is a lot o smal fets, maybe a regular ohm testing is better? Using diode mode right now.

homebrew · « **Reply #3 on:** July 06, 2014, 01:51:49 pm »

Do you have a schematic? Because those tiny SMD packages can house just anything from diodes to BJTs to fets. You also need to know the type of the fet as some of them have diodes built in, whether or not it is PMOS, NMOS, enhancement mode, depletion mode etc etc.