Nui nā ʻano nānā o ka PCBA Board Short Circuit

I ke kaʻina hana o ka SMT chip,kaapuni pokolehe mea maʻamau ka hana ʻino. ʻAʻole hiki ke hoʻohana maʻamau ka papa kaapuni PCBA pōkole pōkole. ʻO ka mea aʻe kahi ala nānā maʻamau no ka pōkole pōkole o ka papa PCBA.

kaapuni pokole

 

1. Manaʻo ʻia e hoʻohana i kahi loiloi hoʻonohonoho pōkole e nānā i ke kūlana maikaʻi ʻole.

2. I ka nui o na kaapuni pokole, pono e lawe i ka papa kaapuni e oki ai i na uwea, a laila mana ma kela a me keia wahi e nana i na wahi me na kaapuni pokole.

3. Manaʻo ʻia e hoʻohana i ka multimeter e ʻike inā ua pōkole ke kaapuni kī. I kēlā me kēia manawa i hoʻopau ʻia ka pā SMT, pono ka IC e hoʻohana i ka multimeter e ʻike inā ua pōkole ka mana a me ka lepo.

4. E ho'ā i ka pūnaewele kaapuni pōkole ma ke kiʻi PCB, e nānā i ke kūlana ma ka papa kaapuni kahi e hiki ai ke kaʻapuni pōkole, a e nānā pono inā he pōkole pōkole i loko o ka IC.

5. E mālama pono i ka wiliwili i kēlā mau ʻāpana capacitive liʻiliʻi, i ʻole e hiki mai ke kaapuni pōkole ma waena o ka mana a me ka lepo.

6. Inā loaʻa kahi puʻupuʻu BGA, no ka mea, ua uhi ʻia ka hapa nui o nā hui solder e ka chip a ʻaʻole maʻalahi ke ʻike, a he mau papa kaapuni multilayer lākou, ʻōlelo ʻia e ʻoki i ka mana o kēlā me kēia chip i ke kaʻina hana. , a hoʻohui iā lākou me nā peʻa magnetic a i ʻole 0 ohm kūpaʻa. Inā he pōkole kaapuni, ʻo ka wehe ʻana i ka ʻike leʻaleʻa magnetic e maʻalahi ke ʻimi i ka chip ma ka papa kaapuni.