Electronics Forum | Tue Jan 03 08:53:05 EST 2023 | tommy_magyar
How many assemblies you will have and how many transformers per assembly?
Electronics Forum | Tue Jan 03 09:08:02 EST 2023 | msirifat
Hello, It's around 10,000 assemblies & 1 transformer/assembly.
Electronics Forum | Thu Jan 05 23:11:38 EST 2023 | SMTA-64419298
Good luck if you pursue Rifat Les Beller
Electronics Forum | Sun Dec 25 09:51:54 EST 2022 | msirifat
Hello, We use OSP-finished PCB. One component (transformer) will be delayed (approximately 4 months) to getting in our hands. We want to partially complete the PCBA (both SMT & MI) in the meantime and later insert the transformer upon arrival thr
Electronics Forum | Tue Dec 27 18:24:46 EST 2022 | davef
Certainly, you need to take proper precautions in storing assembled boards. The main unknown: OSP changes after soldering, whether it remains solderable is the question. A lot of that has to do fabrication of your boards. Your fab will have insights
Electronics Forum | Tue Jan 03 09:22:31 EST 2023 | tommy_magyar
As Davef mentioned above, I would be very precautious too with storing assembled boards in general. Especially because its OSP and the quantity is very high. Why would you build these with shortage on the assembly? Can't this wait until you have the
Electronics Forum | Tue Jan 03 12:37:08 EST 2023 | stephendo
If you haven't opened the boards yet, don't. OSP is the least expensive finish and as flat as any. BUT there is a reason most places don't use it. It does not store at all well. If you want any flexibility regarding storage of pcbs then go with ENIG.
Electronics Forum | Wed Jan 04 03:08:12 EST 2023 | msirifat
Hello Stephen, thanks for the advice. We are producing LED TVs & we have a facility for SMT and manual insertion. We are also thinking of changing the board finish from OSP (due to its shorter shelf life) to ENIG/Immersion Tin.
Electronics Forum | Fri Jan 06 12:21:44 EST 2023 | jdengler
I would wait. Scrap the bare boards you have and order fresh boards to arrive when the late component is scheduled to arrive and run as normal. Unless the bare board is exceptionally expensive this is the cheapest and safest route to take. Jerry
Electronics Forum | Wed Jan 04 03:03:13 EST 2023 | msirifat
Hello Magyar, the main reason is supply chain disruption due to covid in china. The regular lot transformers failed in IQC, so we ordered a new lot but it's delayed due to covid. Meanwhile, some other components (bare PCB, capacitor) will be out of s
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