Mekhoa e tšeletseng ea tlhahlobo ea PCB boto ea potoloho potoloho e khutšoanyane

1. Bula setšoantšo sa moralo oa PCB k’homphieutheng, khantša marang-rang a khutsufalitsoeng, ‘me u bone moo e leng haufi, ho leng bonolo ho hokela ho eona. Ela hloko ka ho khethehileng potoloho e khutšoanyane ka hare ho IC.

2. Haeba e le tjheseletso ka letsoho, hlaolela mokgwa o motle:

1) Pele ho soldering, hlahloba boto ea PCB ka pono, ‘me u sebelise multimeter ho hlahloba hore na lipotoloho tsa bohlokoa (haholo-holo motlakase le fatše) li khutšoanyane;

2) Nako le nako ha chip e rekisoa, sebelisa multimeter ho hlahloba hore na motlakase le fatše li khutšoanyane;

3) Se ke oa lahlela tšepe ea solder ka mokhoa o sa reroang ha u soasoa. Haeba u lahlela solder holim’a maoto a solder a chip (haholo-holo likarolo tsa holimo), ho ke ke ha e-ba bonolo ho e fumana.

3. Ho fumanoa potoloho e khutšoanyane. Nka boto ho khaola mohala (haholo-holo o loketseng mapolanka a le mong / a mabeli a mabeli), ebe o matlafatsa karolo e ‘ngoe le e’ ngoe ea thibela e sebetsang ka thoko ‘me ue felise mohato ka mohato.

4. Sebelisa sesebelisoa sa tlhahlobo ea sebaka sa potoloho e khutšoane

5. Haeba ho na le chip ea BGA, kaha lihlopha tsohle tsa solder li koahetsoe ke chip ‘me li ke ke tsa bonoa, ‘me ke letlapa la lihlopha tse ngata (ka holimo ho lihlopha tse 4), ho molemo ho arola matla a matla a chip e’ ngoe le e ‘ngoe nakong. moralo, o sebelisa lifaha tsa makenete kapa khokahanyo ea 0 ohms Resistor, kahoo ha ho e-na le potoloho e khuts’oane lipakeng tsa phepelo ea motlakase le fatše, ho lemoha ha lifaha tsa makenete hoa khaoha, ‘me ho bonolo ho fumana chip e itseng. Hobane tjheseletsa ea BGA e thata haholo, haeba e sa tsoe ka mochine ka mochine, ho hloka tlhokomelo e nyenyane ho tla khutsufatsa phepelo ea motlakase e haufi le fatše libolo tse peli tsa solder.

6. E-ba hlokolosi ha u rekisa li-capacitor tse nyenyane tse holim’a metsi, haholo-holo li-filter capacitor (103 kapa 104), tse ka bakang potoloho e khutšoanyane habonolo pakeng tsa motlakase le fatše. Ha e le hantle, ka linako tse ling ka bomalimabe, capacitor ka boeona e khutšoanyane, kahoo tsela e molemohali ke ho hlahloba capacitor pele ho welding.