Electronics Forum: checking (Page 1 of 604)

Mosfet checking

Electronics Forum | Wed Dec 31 02:50:41 EST 2014 | slouis2014

I have 4 boards already burn, that's why I want to check it prior power input. Is their a way I can check if it is in good working condition. I suspected it to have source to drain short but not sure on how to check it.need help thanks.

Mosfet checking

Electronics Forum | Tue Dec 30 09:33:29 EST 2014 | rgduval

Power up the circuit, and see how it performs. Check voltages at the input and the output, and compare to a known good board. Otherwise, you can check resistance in an un-powered circuit. Compare the readings to a known good board. cheers, ..rob

Mosfet checking

Electronics Forum | Wed Dec 31 09:10:48 EST 2014 | rgduval

If you suspect a short, check the resistance on a new board that hasn't been powered up. The data sheet should give you the junction resistances that you're looking for. Double check against a component not assembled on the board. If you measure a

Mosfet checking

Electronics Forum | Thu Jan 01 22:30:14 EST 2015 | slouis2014

Will do...thanks

Mosfet checking

Electronics Forum | Sun Dec 28 21:18:43 EST 2014 | slouis2014

Can you give any idea on how can I check if the MOSFET in the circuit is defective or not. do i need to remove it from the circuit to test it.thanks alot

Solder paste height checking

Electronics Forum | Fri Feb 18 23:21:00 EST 2005 | JSS

Hi Everybody, Mostly customer asked about the solder paste height checking after printing process.Is it compulsory to check the height if we are using stainless steel stencil and metal blades in fully automatic printer.Any technical answer to their

checking QFP's for opens

Electronics Forum | Tue Sep 13 09:50:10 EDT 2005 | slthomas

oops.

Solder paste height checking

Electronics Forum | Mon Feb 21 02:02:54 EST 2005 | JSS

First of all THANKS for thr reply. I totally agree with u that paste dried,stencil aperture clogged like probs comes during the production but we hv a visual inspection stage (with 5X illuminated lamp)after printing process and before inserting the

Solder paste height checking

Electronics Forum | Tue Feb 22 01:38:42 EST 2005 | JSS

We r using QFPs of 0.5mm pitch and r not getting any soldering prob at the end.But some new customer insists upon the thickness check of the solder paste after printing. At present we don't hv thickness checking system.We r controlling the amount of

checking QFP's for opens

Electronics Forum | Tue Sep 13 09:12:12 EDT 2005 | stepheniii

I couldn't find any sanctioned procedure for dragging a pick across the leads to check for opens. I've never been a big fan of this anyways. Other than visually inspecting under a microscope and touching the leads that look suspect is there anything

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