Electronics Forum: out (Page 492 of 1200)

Mixing No-clean and water soluble processes

Electronics Forum | Tue Feb 23 12:56:03 EST 2010 | vleasher

Is there any harm in washing SMT soldered with NoClean paste? The PCA has some large thru-hole connectors that we would prefer to do as water soluble on out selective solder but the SMT consists of LGA's and other low parts that we would not be able

X-Ray Inspection

Electronics Forum | Thu Mar 04 07:19:37 EST 2010 | rajeshwara

Greetings, > > Can you recommend an X-Ray > inspection system and recommend which ones to > stay away from. > > Our use is for inspection of > BGAs after re-work and repair - very low > volume. > > Thanks Sparky_ We have glenbrook x-ray insp

PCB Surface Question - Picture attached

Electronics Forum | Thu Mar 25 14:30:29 EDT 2010 | boardhouse

I would not use the product. Solder balls on a massive scale would be one issue due to all the exposed copper. Throw them out, it will be cheaper and less of a headache. I would also question your board shops quality control or lack of for letting

Cp-6 reads only two fiducials?

Electronics Forum | Tue Mar 30 12:45:54 EDT 2010 | rodrigo

We seemed to have a serious gap of information in this area. The technician found out about this MM, MN, SM stuff and we're reading and learning about them. We didn't use MM or SM for anything. I guess there is a price to pay for not having the prope

Quad 4C place problem

Electronics Forum | Wed Mar 31 10:08:13 EDT 2010 | leemeyer

First I would only be concerned about the front panel led's if the transport is not clamping. These LED's are most likeley burnt out. If the transport clamps your sensors are working properly. If you are seeing a "Place 1 Z" on the handheld it is ask

PCBA Cleaning rags

Electronics Forum | Thu Apr 01 14:31:09 EDT 2010 | cbart

-Are these lint-free rags ESD-protected = yes, must be. I left that out thanks! -How do these lint-free rags remove the flux that seeps under components = no matter its a no-clean material and we are removing for esthestics only. -Have you considered

Is it cheeper to make STM or to buy the SMT service?

Electronics Forum | Thu Apr 08 14:54:39 EDT 2010 | davef

We can make the numbers come-out looking impressive either way. In real life, our sense is: fully burdened, it is a little less expensive to use a contractor. Now, we're only talking costs. Non-cost factors often end-up putting on the brakes and t

Multilayer PCB X-ray inspection

Electronics Forum | Mon Apr 05 17:47:21 EDT 2010 | boardhouse

Hi Deni, X-ray will not be able to see through Power and Grn planes. Your only way to find out is: 1) ask your board supplier to supply stack up used. 2) surface grind layer by layer to validate if it is correct stack up. What is making you think

Cleaning BGA pads prior to rework

Electronics Forum | Thu Apr 08 07:01:51 EDT 2010 | muarty

Hi, Looking for views and some opinions on the best systems to use to clean pads (particularly BGA) prior to carrying out replacement of parts. I'm thinking of vacuum type desoldering systems. Obviously braid is an option which we currently use, but

Stain on PCB from reflow oven

Electronics Forum | Thu Apr 15 14:09:48 EDT 2010 | richardli

We found stains on the boards come out of reflow oven. The board itself color changed to yellowish from white . We understand discolor soldermask due to high temperature. This can be acceptable by our customer not the stains. The stains look like wa


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