Electronics Forum | Wed Dec 05 20:58:21 EST 2012 | davef
Look here IPC-TM-650 2.3.25 [http://www.ipc.org/4.0_Knowledge/4.1_Standards/test/2-3_2-3-25-1.pdf ]
Electronics Forum | Fri May 26 04:58:19 EDT 2023 | auriga2001
I agree with the two other replies. Left alone, it is a defect. If it's just excess adhesive or coating, you can use IPC-7711/7721 'Rework, Modification and Repair of Electronic Assemblies' for guidance on removing. Section 2.3.1 explains how to te
Electronics Forum | Thu May 31 21:45:48 EDT 2012 | davef
rsthompson ... if you're talking about bare boards IPC-5701, Users Guide for Cleanliness of Unpopulated PBC, Table 8 ||Bare board final surface finish Ions||Hot air solder level||OSP over copper||Gold over nickel Chloride||0.75 ug/cm^2||0.75 ug/cm^2
Electronics Forum | Wed Oct 16 13:16:11 EDT 2002 | davef
Hey Mar, Sounds serious!!! Poke around Buehler, Leco, or Struers Try IPC TM-650 Test Methods Manual: 2.3.6A Etching, Ammonium Persulfate Method - 7/75 2.3.7A Etching, Ferric Chloride Method - 7/75 2.3.7.1A Cupric Chloride Etching Method - 12/94
Electronics Forum | Thu Oct 22 03:10:49 EDT 2015 | myleb
I already check that sir, maybe its a loose > connection or board problem. maybe the ssr board was damaged. try swap the ssr between the A and B stage. Open the machine cover at AF/BF stage, it's the down left board with many connectors (have COV1
Electronics Forum | Thu Feb 05 18:16:37 EST 2009 | adamcrum
Can somebody help me to understand what standards are in place for deinozed water for cleaning circuit boards. I know they are supposed to be in acordance with J-STD-001D, but what does that entail? All I can find on the internet is that J-STD-001D a
Electronics Forum | Mon Oct 16 16:30:27 EDT 2023 | yannick_herzog
@MagyarT the error occurred across multiple PCBs throughout the entire job. So, for example, the issue isn't limited to just the first printed one but spans the entire duration. At what dimensions would you recommend a division? The apertures on the
Electronics Forum | Tue Apr 23 15:35:45 EDT 2013 | dyoungquist
Check out IPC-A-600. Revision G (July 2004) section 3.2.3 (surface) and section 3.2.4 (internal) give min/max thicknesses for various weight copper. The min also changes depending on what class (1-3) standard you are working to.
Electronics Forum | Wed Jan 26 08:36:06 EST 2005 | jdengler
Sasha, A standard RS-232 cable with the proper connectors would work. If you want you can make it. Normally the PC will have a DB-9 theses days so the wiring would be PC Machine DB-9 DB-25 2------2 3------3 5------7 Good
Electronics Forum | Tue Jan 07 02:04:45 EST 2020 | robl
Hi Mikey, Your signal pins (2 & 3) for USB1, 2, & 3 are all connected together so there is no way of splitting the incoming signals from the 3 ports. Normally there would be an IC (a USB hub controller) switching between the signals so that the PC
