Electronics Forum | Mon Aug 23 16:37:22 EDT 2004 | Terry
Three methods, all work, all require generous use of flux. 1.) Use a heated, electrical desoldering tool with flux. Just be sure that you select a forgiving desoldering tip with a rounded tip end to it so that you do not scratch the pad. Advantage:
Electronics Forum | Mon Jan 24 22:28:57 EST 2005 | davef
In addition to the potential problems you mentioned, add: * Barrel cracking of PTH and via. * Lifted pads. * Warped boards. And the reason you're not using a solder fountain to to solder this connector is? Or use an old trick we've done here on SMT
Electronics Forum | Thu Oct 05 15:41:36 EDT 2006 | Mario Scalzo, SMT CPE
Good afternoon. From what it sounds like is that the solder joins are not getting hot enough or if it Au, then the increase in the Au content of the joint is increasing the melting point of the final solder joint. To some extent, this will also hap
Electronics Forum | Thu Feb 14 23:37:38 EST 2008 | operator
That is bizarre. I would have to say that you need to do a test on the PCB to test solderability with an iron like mentioned before. If you don't find that the pads are contaminated or masked over lightly and the pads do take solder effortlessly, you
Electronics Forum | Mon Dec 07 16:40:37 EST 2009 | jkomets
I have a number of computer parts with faulty VRAM. I have two high-end video cards and a laptop motherboard, each worth over US$100, and some other parts worth less. They all exhibit symptoms typical of faulty VRAM; that is, they display multicolore
Electronics Forum | Mon Aug 30 11:09:13 EDT 2010 | davef
Lots of small parts, lots of hand soldering, lots of tired eyes inspecting on lots of boards: yields lots of room for error. How about this: * Part removal ** Cut each resistor between the pads using dykes ** Using a soldering iron [or hot air pen],
Electronics Forum | Sun Jun 22 13:24:49 EDT 2014 | davef
I don't know. We never had craziness like this before lead-free. You should have the yellowish-metal analyzed to be sure. Guessing: You're seeing this color on the terminations of components, not on the bulk of the SnX solder connection. If that's
Electronics Forum | Mon Aug 05 11:26:03 EDT 2019 | pace_worldwide
Concerning your desoldering equipment, we have made major improvements to prevent solder clogging on PACE Solder Extractor handpieces. Replacing the venerable SX-80, the new SX-100 (and SX-90) Solder Extractor has been improved so that is does not cl
Electronics Forum | Fri Feb 21 10:59:15 EST 2020 | slthomas
I used to work for an OEM that made professional audio equipment (studio monitors, mixing boards, etc.). The mixers required precise alignment of LEDs, switches, and pots in the sheet metal so we used aluminum alignment fixtures during wave solder. T
Electronics Forum | Wed Oct 04 09:55:51 EDT 2006 | borgie
Hi. I have product in lead containing process that consist lead free BGAs and also big ceramic BGAs with high temperature bumbs. Pcb tends to bow in a reflow profile, since I need long preheating times and relatively high peak temperature to melt BG
