Electronics Forum | Sun Oct 19 15:02:10 EDT 2008 | Jdt13
We are having some issues with a RF PCB aprox 1" x 1". The pads are in the bottom of the PCB and it goes on the Top side of the mother board the pads of the RF board are like a BGA (square pads)and we have troubles to make the proper welding in the
Electronics Forum | Mon Oct 20 07:29:17 EDT 2008 | hussman
I assume you mean soldered and not welded. If the one pad that is having problems has a via hole next to it, it probably has more copper around it. Try running a hotter profile.
Electronics Forum | Mon Oct 20 15:24:52 EDT 2008 | davef
During reflow soldering, sometimes via fill with solder leaving the solder connection starved. Questions are: * Specifically, what is the problem you see? * Do the defective pads show that solder has melted in a uniform fashion? * How do the tempera
Electronics Forum | Mon Oct 20 21:57:58 EDT 2008 | jdt13
The problem that I see is the pads not soldered and I can see on the X-Ray the solder on the pad after reflow, and yes the solder has melted in a uniform fashion, I have not measured the diference of temperatures in each pad of the PCB, the size is a
Electronics Forum | Wed Sep 20 10:45:11 EDT 2023 | kirill
Hello A scan board and scan full options has stopped working for me. Any idea how to make these functions work again ?
Electronics Forum | Wed Dec 23 03:33:14 EST 1998 | Charles Stringer
Can anyone recommend a solder stop that can be applied by our PCB supplier. Our current material form Tamura Kaken is causing problems. The material should be capable of withstanding 1 Surface mount IR reflow cycle and 1 wave solder cycle. We need t
Electronics Forum | Tue Dec 29 17:42:27 EST 1998 | Dave F
| Can anyone recommend a solder stop that can be applied by our PCB supplier. Our current material form Tamura Kaken is causing problems. | | The material should be capable of withstanding 1 Surface mount IR reflow cycle and 1 wave solder cycle. | W
Electronics Forum | Mon Aug 31 15:39:18 EDT 2020 | jmelson
Yes, the rightmost VME board is the IO_DPRAM, and it also handles the front panel buttons and E-stop inputs to the computer(s). So, reseat the connectors on the front of that board. Also, there may be an interface board on the bottom left (called C
Electronics Forum | Mon Aug 31 12:01:14 EDT 2020 | inspiredmorris20
Thank you bukas, I have not tried to unslot the computer boards. Are you referring to unplug the hardware connections to each circuit board and reconnect them? Thanks again for the reply!!!
Electronics Forum | Mon Aug 31 19:53:17 EDT 2020 | inspiredmorris20
thank you both, We removed the connections and cleaned them. unfortunately no success, we are testing the conveyor interface board to see if we have a bad board. additionally we found that power supply #3 and #4 do have 110v going in but do not have
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