Electronics Forum | Sat Mar 08 11:04:47 EST 2003 | Joe
Mark, You've already received some good advice from the other posters. The one thing I would add is that even if you solve your printing issues on this type of part, the relative small quantity of paste may be prone to soldering problems. Ever s
Electronics Forum | Mon Oct 06 11:13:32 EDT 2003 | marmotzj
Dear All, I'm encountering a problem on mounting Intel E7501 and P64H2 FC-BGA chips. After the SMT process, these two BGAs were defected. Both had power-to-ground short circuits on the die package itself, and also the die resin had cracking tracks
Electronics Forum | Mon Oct 13 14:30:56 EDT 2003 | jsherrow
Our customer is starting to see some solder joint > failures during their extensive testing > proceedures. Specifically with an SMD/DIP device > that has a very small foot in relationship with > the pad on the PCB. (By SMD/DIP device I mean a >
Electronics Forum | Tue Nov 09 12:00:41 EST 2004 | Dreamsniper
Problem: PQFP208 Pad Width specified as 11.8 thou, PCB came and they are 9.5 thou. Component Lead Width is 10 thou to 10.6 thou. Operators have difficulty aligning and inspecting. Issue: Fed back to PCB Fab House and they said IPC accepts +/- 20% fo
Electronics Forum | Tue Oct 30 10:30:24 EDT 2007 | wayne123
how many layer board is it? what kinda temperatures is your oven currently hitting. In our reflow oven I have been using a profile that is the same for the top and bottom at zone 1 111C zone 2 at 164C zone 3 at 161C zone 4 at 208C and zone 5 at 2
Electronics Forum | Wed Jan 28 21:47:56 EST 2009 | padawanlinuxero
Hello! I am having trouble with the new changes from lead joint to lead free joint, we are working on change to lead free, I am using a 3 zone oven reflow, the zone temps are : zone 1 zone 2 zone 3 (top and bottom) 128 208 260 th
Electronics Forum | Thu Jan 20 23:59:30 EST 2011 | jeffr
These machines have three heads... Head 1 (jaws 0.7mm x 4mm)0603 up to small tantalum. Head 2 (jaws 3.0mm x 20mm)small tant up to PLCC44 or SOP28. Head 3 No jaws, uses just Vision. Can do Large tantalum up to QFP208, however can only take a single no
Electronics Forum | Mon Sep 09 12:00:01 EDT 2013 | proteus
I have a 208 pin QFP that due to manufacture obsolescence I have to get them form the broker market. I've had several issues with the parts including; bent leads, leads that don't take solder very well, co-planarity problems, and DOA fallout after a
Electronics Forum | Sun Nov 27 16:53:39 EST 2016 | ttheis
Our UP500 has been running great for a few months then the AC/DC 5/12/24V power supply stopped working and the PC could not communicate with the cage. The PC screen also got very noisy. We replaced the power supply with a used replacement and the ma
Electronics Forum | Tue Apr 16 09:46:36 EDT 2019 | ttheis
We just bought a MVP Supra M machine and have put it under power but can not get the PC system to power on. I am following the power up procedure in the manual. Under power the conveyor controls work and the UPS backup turns on, but holding the key i
