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J57ltr
RC-Monster Aluminum
 
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Posts: 610
Join Date: Feb 2009
Location: Tomball/ Houston Tx.
07.30.2009, 01:28 PM

When I looked at the pics of your boards I was going to commend you for actually hand assembling these units. But you say these are all done on a pick and place? Everything on that board looks like is was hand soldered. I see no evidence of the glue usually used to hold the component in place before it is put through a wave solder station. If you look at the chip to the right that I believe is the driver for the BEC, two of the pins are almost soldered together (LTBRZ). Most of the components look to have more solder than I would expect to see from machine soldering. I am not bashing your product; in fact I really like the features and abuse they tolerate. But the component clearly came off because of a poor solder joint. Our A/D cards use inductors about the same physical size as the one on your board and we had problems like this as well. I actually made a vibration station to test our cards because of this problem. The larger components just need more heat to properly bond the solder. We had this on inductors and some of the SMT Xtals we use. I have also seen at least one other pic in this forum where a component has come off of the board.

Jeff


The Warnings & Cautions discussed in this manual cant cover all possible conditions/situations. It must be understood that common sense and caution are factors which cant be built into this product.
   
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