Electronics Forum | Wed Jul 10 18:19:42 EDT 2002 | davef
Flex cracking under the terminations is generally regarded as one of the primary causes of failure of ceramic chips. If you can see cracks in the solder joints from board flex, those chips are certainly strongly suspect, and you must assume there is
Electronics Forum | Tue Oct 29 14:11:52 EDT 2024 | spoiltforchoice
The "clever" solution is to revisit the design. Move things, choose a connector with SMT tabs and no locating lugs. File this mistake away under "oops". You should also revisit the datasheets for your parts. Most components should be fine to reflow
Electronics Forum | Sat Oct 26 10:12:32 EDT 2024 | madisreivik
Hello ! Please offer some clever solution for the following problem 2 sided assembly. The side which must be assembled first has 2 SMD RJ45 connectors. They have plastic location pins. Which protrude tru the board, about 0.4mm So, when I want to a
Electronics Forum | Sun Oct 27 09:36:38 EDT 2024 | madisreivik
Yes, thats the most obvious solution :) But its a quite specific and densely packed socket, so my hopes are not that high :)
Electronics Forum | Sun Oct 27 14:01:48 EDT 2024 | kirill
Why would you assemble first side with TH component? Can't you start from the second side?
Electronics Forum | Sun Oct 27 16:47:06 EDT 2024 | madisreivik
I got very few components on the first side and all these are not heat sensitive. On the other side I got 5 times more components, including electrolytic caps and micromodules, which love the lower temp of LMPA pasta and also, they would enjoy more i
Electronics Forum | Sun Sep 27 10:42:35 EDT 1998 | l atch
I'm looking for a chart that will help me identify smt resistors and capacitors. I have figured out a few on my own. a resistor with the numbers 510 printed on it was a 51 ohm resistor. numbers 221 was a 220 ohm resistor. numbers 102 was a 1k resis
Electronics Forum | Wed Apr 22 08:40:18 EDT 2015 | markhoch
Hi Myriam, I think we may need some more information. Is the Electrolytic (Aluminum) Capacitor placed more than once per board? If so, are all locations twisting? This would typically be caused by a thermal imbalance that could be design induced. (u
Electronics Forum | Thu Nov 13 11:45:04 EST 2008 | pbarton
We have seen a similar problem. Turned out to be mechanical stress on the component caused by the method of location and clamping at ICT. Where is the component located on the assembly? Poorly adjusted clamping pillars on clamshell fixtures can cause
Electronics Forum | Mon Sep 28 09:18:30 EDT 1998 | Ben Wilmot
The majority of SMT resistors use the following notation. 10 X eg 153 represents 1k5 resistor The third digit in the sequence denotes the number of zeros to add after the first two digits giving the value in ohms. Many Caps will follow the same nota
