Electronics Forum | Wed Aug 27 18:28:29 EDT 2008 | blnorman
We have an immersion silver board that has a brown discoloration after processing. It's not flux residue, that normally doesn't cause this condition. Elemental analysis shows less than 1% sulfur, and I thought silver sulfide is more a black color.
Electronics Forum | Wed Sep 17 18:12:39 EDT 2008 | dnebel
I have an excess TR1000 available. Bought it from Cencorp for a project 8 years ago and we changed the boards to break outs soon after. Engineering kept it around, thinking it was nice to have "just in case". It was in perfect condition 8yrs ago.
Electronics Forum | Fri Sep 12 18:19:59 EDT 2008 | davef
Questions are: * Why aren't the defective LED blinking? * Do the defective LED blink when removed from the board and tested according to the functional test that you used prior to assembling the boards? * Do the defective LED blink after the solder i
Electronics Forum | Thu Sep 11 14:20:07 EDT 2008 | pcbrown57
Is there any criteria or limitations for SMT pcba's? We have boards in stock that we built and a customer wants to know what our procedure is for "storing" these boards which will have a few through-hole modules soldered to them after they get pulled
Electronics Forum | Mon Sep 15 06:14:49 EDT 2008 | milas
Hi Has anyone experienced laminateand BGA cracking on ENIG finish boards built using a lead free process? The laminate is cracked directly underneath the pad where the solder joint has cracked. We have confirmed the cracking via Microsectioning. We
Electronics Forum | Sat Sep 20 07:11:28 EDT 2008 | Sean
Hello All, I used to hear that PCB with immersion silver finishing, its non component location pads, tend to be discolour (Yellowish) after went through heat cycle, such as reflow oven. However, if the component solderbility on the PCB is OK, can w
Electronics Forum | Thu Oct 02 15:09:32 EDT 2008 | ck_the_flip
Jani, I got it from a very vague spec. from a solder paste supplier who stated, "It is not advisable to refrigerate an already opened container." Sorry, but I don't have details why. My guess is, several temperature excursions, after the air-tigh
Electronics Forum | Wed Oct 08 15:06:32 EDT 2008 | sambolian
I knew I was doing everything right! I haven't forgot after all. That's exactly what I did, but I still get the error of "Fiducials not taught". I thought that maybe I was forgetting something, but that's not the case :( Maybe I have a bug in my soft
Electronics Forum | Fri Oct 17 04:23:51 EDT 2008 | fujiphil
Check the image using the fast inching [F] and axis selection [2]. After vision error, press [F] then [2]. The monitor will display a binary images. You will now have a visual look on how the error occurs. Adjust the CCD level of the camera until you
Electronics Forum | Mon Oct 20 21:57:58 EDT 2008 | jdt13
The problem that I see is the pads not soldered and I can see on the X-Ray the solder on the pad after reflow, and yes the solder has melted in a uniform fashion, I have not measured the diference of temperatures in each pad of the PCB, the size is a
