Electronics Forum | Wed Aug 11 19:06:16 EDT 2010 | 1036
We are small PCB assembly business and new. We built 100 boards for my customer recently and 1 of them failed to the function testing. We visually inspected the board several times and do not see any assembly problem. My customer asked us to trouble
Electronics Forum | Thu Aug 12 15:11:28 EDT 2010 | 1036
Thanks so much to all of you for the info and experience you shared with me here.
Electronics Forum | Wed Aug 11 19:36:20 EDT 2010 | davef
The basic rule is 'it depends:' * You made a proposal to your then potential customer to do certain things. Most contractors include a statement of work ["This proposal is for ... ] in their proposal. * Your customer issued a purchase order [and may
Electronics Forum | Thu Aug 12 13:03:06 EDT 2010 | dyoungquist
Schematics help you troubleshoot further but if you do not have the ability to power up the board, you are limited in how far you can go with your troubleshooting. One solution to this problem we have used is this: The customer agrees to pay for 99
Electronics Forum | Fri Jul 04 05:40:09 EDT 2008 | proy
Thanks, I'll give this a try. Peter
Electronics Forum | Tue Jul 08 22:44:06 EDT 2008 | proy
I made progress and almost acceptable results by adding heat to the bottom of zone 4 HOWEVER, the core problem I uncovered last night/this morning was that the #4 top side blower had failed. I think this is the key why I was having so much trouble.
Electronics Forum | Fri Jul 04 00:36:25 EDT 2008 | shrek
Try a linear, very flat ramp rate on the order of 0.5 degrees celcius per second. I know this is hard to accomplish with a five zone, but try to lower the first couple of zones (the preheat zone), and then spike to reflow aggressively during your la
Electronics Forum | Thu Jul 10 10:25:05 EDT 2008 | gregoryyork
I guess the paste is Leaded hence the 220 Peak temp and the Sn100c is Eutectic at 227C so you need to be hotter to melt the HASL finish or you are relying on it alloying together with the paste which takes much longer. suggest running peak temp of 23
Electronics Forum | Thu Jul 03 19:27:54 EDT 2008 | proy
5 Zone HVA70 Oven Board 6 layer, 10" x 13" lots of space, most critical is 100 pin QFP AIM Water Soluble 487 Tin Lead paste on SN100C HASL boards This board is giving me disproportionate grief! I am running 23 in / min which gives me about 3.1 mi
Electronics Forum | Fri Jul 25 14:47:16 EDT 2014 | hlansberg61
Trouble shooting.
