Anakart \u00fczerinde bulunan grafik \u00e7ipinin metal \u0131s\u0131 tabakas\u0131n\u0131 s\u00f6keriz. \u0130nce bir b\u0131\u00e7ak kullanarak \u00e7ipin y\u00fczeyinden bu tabakay\u0131 dikkatlice ay\u0131r\u0131yoruz.<\/p>\n
Metal \u0131s\u0131 tabakas\u0131n\u0131 kald\u0131rd\u0131ktan sonra %90 saf izopropil alkol ile \u00e7ipinin y\u00fczeyini temizliyoruz.<\/p>\n
Ard\u0131ndan grafik \u00e7ipinin her k\u00f6\u015fesini s\u0131v\u0131 lehim pastas\u0131 ile kapl\u0131yoruz.<\/p>\n
Al\u00fcminyum folyo kullanarak anakart\u0131n grafik \u00e7ipi d\u0131\u015f\u0131nda kalan par\u00e7alar\u0131n\u0131 kapl\u0131yoruz.<\/p>\n
Is\u0131 sens\u00f6r\u00fc telini grafik \u00e7ipinin bir kenar\u0131na biti\u015ftiriyoruz.<\/p>\n
Anakart\u0131, BGA Rework makinesine yerle\u015ftiriyor ve do\u011fru yerle\u015fimi sa\u011flamak i\u00e7in tutma panellerini s\u0131k\u0131la\u015ft\u0131r\u0131yoruz.<\/p>\n
Grafik \u00e7ipi i\u00e7in 1 dakikal\u0131k orta d\u00fczeyde bir s\u0131cakl\u0131k ayarlay\u0131p, daha sonraki 1 dakika i\u00e7in s\u0131cakl\u0131\u011f\u0131 aniden 250 dereceye y\u00fckseltiyoruz. Bunun ard\u0131ndan lehimin eridi\u011fini ve \u00e7ip tutucusu yard\u0131m\u0131yla \u00e7ipin kolayl\u0131kla \u00e7\u0131kart\u0131yoruz.<\/p>\n
\u00c7ipi s\u00f6kt\u00fckten sonra BGA y\u00fczeyine biraz lehim pastas\u0131 s\u00fcr\u00fcyoruz. Havya yard\u0131m\u0131yla devre kart\u0131n\u0131n y\u00fczeyinde kalan lehimi temizliyoruz. Hayvay\u0131 biraz \u0131s\u0131t\u0131p ve devre kart\u0131n\u0131n \u00fczerinde gezdiriyoruz.<\/p>\n
Bir par\u00e7a lehim s\u00f6kme fitili kesiyoruz ve devre kart\u0131n\u0131n y\u00fczeyine koyuyoruz. Ard\u0131ndan lehim s\u00f6kme fitilini hayvay\u0131 kullanarak \u00e7ip \u00fczerinde gezdiriyoruz. Kalan lehimin s\u00f6kme fitili \u00fczerinde topland\u0131\u011f\u0131n\u0131 ve y\u00fczeyin temizlendi\u011fini g\u00f6r\u00fcyoruz.<\/p>\n
T\u00fcm bunlardan sonra \u00e7ipi, \u00e7ip kab\u0131na oturtmam\u0131z ve t\u00fcm temizleme i\u015flemini \u00e7ip i\u00e7in de yapmam\u0131z gerekiyor. \u00c7ipi yerle\u015ftirdikten biraz lehim pastas\u0131 koyuyourz ve havya yard\u0131m\u0131yla \u00e7ip \u00fczerine yay\u0131yoruz. Bir s\u00fcre ge\u00e7tikten sonra da bir par\u00e7a lehim s\u00f6kme fitilini \u00e7ip \u00fczerinde havya yard\u0131m\u0131yla gezdiriyoruz. \u00c7ip temiz g\u00f6z\u00fck\u00fcr duruma gelecek.<\/p>\n
Ard\u0131ndan bir par\u00e7a lehim pastas\u0131n\u0131 parma\u011f\u0131m\u0131z\u0131n yard\u0131m\u0131yla \u00e7ipin \u00fczerine koyuyoruz. Bunu yapmak reballing i\u015flemini yaparken \u00e7ipin lehim toplar\u0131yla daha iyi birle\u015fmesini sa\u011flayacakt\u0131r.<\/p>\n
Ard\u0131ndan orta ve \u00fcst kapa\u011f\u0131 koyuyoruz ve t\u00fcm vidalar\u0131 s\u0131karak kab\u0131n olmas\u0131 gerekti\u011fi gibi bir araya gelmesini sa\u011flayoruz.<\/p>\n
Daha sonra lehim toplar\u0131n\u0131 metal tabakan\u0131n y\u00fczeyine koyuyoruz. Bu i\u015flemi yaparken toplar kendili\u011finden k\u00fc\u00e7\u00fck bo\u015fluklara dolacak ve k\u0131sa s\u00fcre i\u00e7inde bo\u015fluk kalmayacak. Nazik\u00e7e kab\u0131 sallayarak kalan bo\u015fluklar\u0131n dolmas\u0131n\u0131 sa\u011fl\u0131yoruz.<\/p>\n
T\u00fcm bo\u015fluklar\u0131 ba\u015far\u0131l\u0131 \u015fekilde doldurduktan sonra kab\u0131n vidalar\u0131n\u0131 dikkatlice \u00e7\u0131kar\u0131p \u00fcst tutucu k\u0131sm\u0131 nazik\u00e7e s\u00f6k\u00fcyoruz.<\/p>\n
Is\u0131 tabancas\u0131 yard\u0131m\u0131yla \u00e7ipi \u0131s\u0131tmaya ba\u015fl\u0131yoruz.<\/p>\n
Ard\u0131ndan birka\u00e7 damla s\u0131v\u0131 lehim pastas\u0131n\u0131 anakart \u00fczerinde \u00e7ipin gelece\u011fi yere d\u00f6k\u00fcp yaymaya ba\u015fl\u0131yoruz. Sonra \u00e7ipi do\u011fru konumunda olacak \u015fekilde anakarta geri yerle\u015ftiriyoruz.<\/p>\n
Ard\u0131ndan \u00e7ipi tekrar \u0131s\u0131t\u0131yoruz. \u00d6n \u0131s\u0131tma a\u015famas\u0131 i\u00e7in saniyede yakla\u015f\u0131k 2 derece artacak \u015fekilde 60 saniyede s\u0131cakl\u0131\u011f\u0131n 100 dereceye ula\u015fmas\u0131n\u0131 sa\u011flayoruz. Daha sonra s\u0131cakl\u0131\u011f\u0131n her 2 saniyede 1 derece y\u00fckselmesini sa\u011flayarak, 120 saniye i\u00e7inde 150-165 dereceye ula\u015fmas\u0131n\u0131 sa\u011flayoruz. En son a\u015famada ise s\u0131cakl\u0131\u011f\u0131n 235-265 derece aral\u0131\u011f\u0131na \u00e7\u0131kmas\u0131n\u0131 sa\u011fl\u0131yor ve s\u0131cakl\u0131\u011f\u0131 bu d\u00fczeyde 20 saniye tutuyoruz.<\/p>\n
Her \u015feyi tamamlad\u0131ktan sonra \u00e7ipin \u00fczerine metal \u0131s\u0131 tabakas\u0131n\u0131 geri yerle\u015ftiriyor ve cihaz\u0131n do\u011fru \u00e7al\u0131\u015f\u0131p \u00e7al\u0131\u015fmad\u0131\u011f\u0131n\u0131 tespit ediyoruz.<\/p>\n
\u0130\u015fte reballing i\u015flemini bu \u015fekilde yap\u0131yoruz. Bga cihaz\u0131 olmadan s\u0131cak hava cihazlar\u0131 ile chip s\u00f6kme i\u015flemi tamamen anakarta zarar verdi\u011finden bga rework cihaz\u0131 kullanmaktay\u0131z.<\/p>\n