Electronics Forum: functional (Page 1 of 120)

SMT LED functional failure

Electronics Forum | Wed Apr 16 01:40:17 EDT 2003 | praveen

Hi , We are using water wash solder paste to solder the SMT LED's manufactured by Chicago Miniature lamp (CMD93-21 & 22)and Kingbright. Achieving the solder fillet , wetting has no issue but we observe high fallout at the functional testing. If we do

SMT LED functional failure

Electronics Forum | Wed Apr 16 20:22:13 EDT 2003 | praveen

Hi, I have taken the profile.The peak temp. at the lead terminal is 219 degc, duration above MP 54 sec and duration 125 deg C-160 deg C is 60 sec.

SMT LED functional failure

Electronics Forum | Thu Apr 17 10:25:42 EDT 2003 | davef

You'd think 219*C should be warm enough, but we'd go higher just to get the part to stick. What is: * LED terminations material? * Alloy and flux type of your solder paste? Is you solder sticking to the pad and not to the component? Or what?

SMT LED functional failure

Electronics Forum | Wed Apr 16 08:43:00 EDT 2003 | davef

Given that the LED work properly after being touched-up and that you don't have problems with other components, you may not be wetting the LED termination solderability protection during your normal reflow. Use a profiler to check the temperature on

PCBA fail functional test due to frequency drift

Electronics Forum | Wed Oct 14 03:21:37 EDT 2009 | lincy

We found a PCBA performance have insertion loss at the functional test process. We did some analysis and conclude the main root cause is from the PCB performance. What is the critical parameter in PCB will cause a failure in PCBA frequency performan

Relying on AOI for sensor boards - EOL for functional test

Electronics Forum | Mon Jul 30 12:45:00 EDT 2018 | mdkmdr

Trying to get a sense of the push-pull going on between designers and manufacturers on the subject of 'one test point per net'. Getting a feeling like the new paradigm is doing all of the electrical tests as functional at EOL and relying almost comp

Relying on AOI for sensor boards - EOL for functional test

Electronics Forum | Tue Jul 31 04:45:42 EDT 2018 | robl

Depends on what sort of outfit you are working for, and what you are building. A lot of CEMs are doing Flying Probe or ICT on the boards ahead of investing time building into units or adding parts that prevent access to rework. We have a combination


Electronics Forum | Tue Jan 20 16:04:10 EST 1998 | DCAMPB

Does anyone know who can provide functional debug training on Pentium Systems within the UK

Functional Test Faulure due to BGA ICs

Electronics Forum | Mon Jul 24 12:25:55 EDT 2006 | GMan

Is there any ICT done prior to the Functional?

Functional Test Development

Electronics Forum | Tue Aug 10 09:27:35 EDT 2010 | ssager

I am looking for someone who can develop functional test programs. Something that can use a LabView or some other graphical interface to do simple functional testing and verification.

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