Thank you. I didn't build the clock myself....so I ask this question, why would the MOSFET of been replaced if it's a brand new kit?
Thank you, -Darin On Friday, October 10, 2014 11:30:40 PM UTC-5, nixiebunny wrote: > > Darin, > > That is the MOSFET. It's been replaced, which is what the brown stuff on > the bottom of the board came from. That's residue from solder wick > braid, and from solder. > > None of this stuff is the least bit problematic. If it was me doing the > work, I would have cleaned it off with isopropyl alcohol and a cotton > swab before shipping the clock. > > Don't worry, it's not acid core solder. That looks different. > > On 10/10/14 9:05 PM, Dman777 wrote: > > That is a big relief....thank you. Here is a picture of where those > > right legs are exactly soldered to on the other side. From what I can > > gather, this would be the closet part to the heated concentrated > > area...although the heat area seems is a little more off to where the > > tubes are. Not sure if it's because the air is traveling out the circle > > openings? > > > > Thanks, > > -Darin > > > > > > > > > > On Friday, October 10, 2014 8:53:05 PM UTC-5, Arne Rossius wrote: > > > > Hi, > > > > Dman777 wrote: > > > Using my camera and zooming in, I see some strange markings on > > PCB board > > > surface and some brown/burn spots also. Could this have anything > > to do with > > > the heat concentration? What are these from? I attached a couple > of > > > pictures. > > > > The brown gooey-looking stuff is probably flux residue from > soldering > > the component (which is on the other side). The component warms up > the > > flux residue and it turns from transparent or yellow-ish to brown. > This > > is nothing to be worried about, but if you want to get rid of it you > > can > > clean it off with some isopropanol. > > > > By the way, is that the footprint of the MOSFET? If unsure, take a > > picture of the same spot from the other side of the board. This > would > > confirm my suspicion that it is the main heat source. > > > > > > Best Regards, > > Arne > > > > -- > > You received this message because you are subscribed to the Google > > Groups "neonixie-l" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to [email protected] <javascript:> > > > > To post to this group, send email to [email protected] > <javascript:> > > <mailto:[email protected] <javascript:>>. > > To view this discussion on the web, visit > > > https://groups.google.com/d/msgid/neonixie-l/a2c3acbe-99f5-4b8a-ae6d-0673f2caeb89%40googlegroups.com > > > < > https://groups.google.com/d/msgid/neonixie-l/a2c3acbe-99f5-4b8a-ae6d-0673f2caeb89%40googlegroups.com?utm_medium=email&utm_source=footer>. > > > > For more options, visit https://groups.google.com/d/optout. > > > -- > David Forbes, Tucson AZ > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/db95bb83-dfa2-4c65-9726-3176083128b0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
