Re: [beagleboard] Re: Soldering JTAG connector with Element14(Embest) version BBB failed

2015-03-25 Thread Claud Xiao
Hi guys, Followed Tom and Gerald's suggestions, I tried it again by 800F with the lead-free solder. This time everything go well just like the tutorials and it works now! Many thanks to all of you! - Claud On Tuesday, March 24, 2015 at 7:27:37 AM UTC-7, Gerald wrote: > > Lead free. High temp

Re: [beagleboard] Re: Soldering JTAG connector with Element14(Embest) version BBB failed

2015-03-24 Thread Claud Xiao
Hi Harvery, 700 dgree can melt lead-free solder *directly* very well -- that's how I adhere a layer of solder to connector pins. Then I put connector on top of P2 on the board and heat the pins for making the solder melt and connect joint just like the video. But the solder between pins and P2

Re: [beagleboard] Re: Soldering JTAG connector with Element14(Embest) version BBB failed

2015-03-23 Thread Claud Xiao
Thank you Tom and Harvey! I'll try again with higher temperature (800 or even more higher till it melts) as well as adopt Harvey's suggestions. Result will be reported in this thread. I used lead-free .022 in 700 degree. Temperature is one of a few factors I haven't adjusted in those attempts

[beagleboard] Soldering JTAG connector with Element14(Embest) version BBB failed

2015-03-22 Thread Claud Xiao
Hi, I tried to solder ARM20cTI20 JTAG connectors with Element14’s BBB but failed, twice (hence two boards broken). After some investigations, I think it’s not my fault but is manufacturer’s problem. Element14’s version and CircuitCo’s version are really different in this issue. As you may kno