Electronics Forum | Wed Nov 27 08:01:15 EST 2019 | tsvetan
Hi, Recent power blackout damaged our SONY F209 UPS ATA power supply and machine's HDD got corrupted at the same time. Power supply is replaced, but now the machine refuses to boot. The registry file for windows NT 2000 with all software installati
Electronics Forum | Wed Dec 04 04:28:58 EST 2019 | oxygensmd
It seems there isn't right connection between solder and solder-legs. Maybe check that the LEDs get huminidity, have some oxidation on the legs, try different solder paste, check the reflow solder profile. On the photo I can not saw properly reflowe
Electronics Forum | Wed Dec 04 08:00:57 EST 2019 | kylehunter
Thank you both. We are using EP256 Solder Paste Sn63Pb37 no clean from Kester. I attached our profile as well as Kester's target profile. We used a populated demo board for the profile. We tested along the width, and was less than a 2c difference.
Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks
We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio
Electronics Forum | Thu Dec 05 05:39:05 EST 2019 | oxygensmd
I know your application isn't BGA but the data sheet also mention about the peak temperature - 235 Celsius. For the LEDs you can reach higher temperature and I recommend to reach 225-235 Celsius. You will get significantly better results because the
Electronics Forum | Tue Dec 17 14:11:43 EST 2019 | kylehunter
Haven't run those boards again, so haven't had the issue.. Since it seems like we may want to start using more aggressive flux based paste soon, what are some good choices? Ideally I'd like to stay with Kester, since they are readily available. EP2
Electronics Forum | Wed Dec 11 06:47:33 EST 2019 | ameenullakhan
Dear Friends, Need your valuable feedback on how to identify the component is ok or not for manufacturing. Issue : We have parts which are more than 5 years old.And management want us to qualify this parts for production. We presently use below me
Electronics Forum | Mon Dec 23 12:22:03 EST 2019 | kylehunter
> I would suggest having both SMT lines next to > each other rather than separate by tables, worst > yet, another big machinery. You might not have > the machines yet for those empty line#2 space, > but you can use it as a tempora
Electronics Forum | Mon Jan 06 13:49:14 EST 2020 | slthomas
A lot of people also assume that the filtration is for cleanliness of the gasses that are leaving the plant, and that is not the case. I helped spec. (like you, Rob, I let someone else do the math) a system like yours, with a single common main trun
Electronics Forum | Mon Dec 30 12:55:37 EST 2019 | emeto
We saw your profile, which in my opinion looks alright based on the guideline from the vendor. Can you tell us more about the joints that you cleaned? Are they showing nice wetting and nice and shiny finish? How about your stencil thickness? From my
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