PCBA Circuit tabula WELDING Discus Nigrum forsit est magis commune circuitu tabula malum phaenomenon, unde in PCBA Welding Disc Nigrum pro multis rationes, sed plerumque ex causis

1, pad oxidation: If the PCBA pad is exposed to humidity for a long time, it will cause the surface of the pad to oxidize, forming an oxide film on the surface of the pad, resulting in black, therefore, when storing PCBA, attention should be paid to keeping the environment dry, and at the same time, PCBA should be vacuumed in time to avoid its long-term exposure to the air!

II, Welding processum problems, in reflow welding aut undam solidatorium, si welding temperatus est nimis alta vel welding tempus longum est, etiam ad oxidatio temperatus ad awardus, ita ad normam operating Specifications ad Welding!

3, solder problem: solder generally refers to the solder paste, tin, solder quality is good or bad, if the use of poor quality solder, will also make the solder in the harmful substances and impurities released, resulting in black pad, so, in the choice of solder, we must avoid the use of low-quality solder!

IV, Purgato problems: plerumque loqui in casu de usu fluxu est opus ad emundare tabula, ut removere fluxus residui in codex, si fluunt, ut non plene, et hi RELICTUM, ut pad non est ad altum temperaturis, ita ut pad non est in altum temperaturis, ita ut ad pad nigrum. Ideo opportune purgatio post welding est necessaria!

V, component problems: si qualis est electronic components non est bonum, aut materiale in component pin est improprium, ut etiam ducere ad pin nigrum welding et pin, cum electronic ut qualis est, ut et pin, ut sit qualitas et pin, ut qualis est qualitas.

Quod supra est pelagus ratio ad PCBA welding lance nigrum, et secundum diversas rationes, possumus etiam eligere correspondentes emendationem mensuras superiores, ita ut efficaciter reducere quaestionem de PCBA welding ad redigendum, amplio qualis products!