IC Reballing Kaise Kare: BGA Repair & Stencil Guide | Lesson 36

Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 36 hai.

Aaj hum mobile repairing ke sabse “Advance Level” topic par baat karenge. Aksar naye technicians ke man mein yeh sawal hota hai ki dead phone ko zinda karne ke liye IC Reballing Kaise Kare?

Jab koi phone girta hai, toh aksar bahar se screen sahi dikhti hai, lekin motherboard ke andar IC ke neeche ka solder toot jaata hai (Dry Solder). Aise cases mein sirf Reballing hi phone ko bacha sakti hai.

Is post mein hum step-by-step seekhenge ki ek professional ki tarah IC Reballing Kaise Kare taaki balls ek baar mein perfect banein.

Step 1: Zaroori Tools (Reballing Kit)

Sahi tarike se IC Reballing Kaise Karein, ye janne se pehle aapke paas sahi hathiyar (Tools) hone chahiye. Saste tools se kaam kharab ho sakta hai:

1. Stencil (Jaali): Koshish karein ki Universal Stencil ki jagah Model Specific (usi IC ki) stencil use karein. Isse alignment aasaan hoti hai.
2. PPD Paste (Solder Paste):
   • 183°C (Lead wala): Power IC aur Network IC ke liye best hai (Mazboot balls banti hain).
   • 138°C (Lead Free): CPU aur Double Decker ke liye best hai (Jaldi pighalta hai).
3. Flux Paste: Achi quality ka (Mechanic/Relife) use karein.
4. Wick Wire: Goodwick ya Goot wick best hoti hain.

Step 2: Removing the IC (Sahi Temperature)

IC Reballing Kaise Karein, iski shuruat IC nikaalne se hoti hai. Agar yahan galti hui, toh board ke prints ukhad jayenge.

1. Preparation: IC ke bagal mein agar koi plastic connector hai, toh uspar Silver Tape lagayein taaki wo pighle nahi.
2. Settings: SMD Rework Station ko 350°C – 380°C Heat aur 3-4 Air par set karein.
3. Process: Hot gun ko gol-gol ghumayein. 30-40 second baad chimti se check karein. Jab solder pighal jaye (IC halki hilne lage), tab usey Seedha Upar utha lein.

Step 3: Cleaning (Sabse Zaroori Step)

IC nikaalne ke baad board aur IC dono par purana solder bacha rehta hai. Isey saaf karna zaroori hai.

1. Iron + Wick: Board par thoda flux lagayein. Desoldering Wick ko pads par rakhein aur upar se Iron chalayein.
2. Light Hand: Iron ko board par Ragadein Nahi (Do not rub), bas halke haath se chalayein.
3. Result: Board bilkul Flat (Chapta) hona chahiye. Ungli pher kar dekhein, koi khurdura-pan (roughness) na ho.

Step 4: Stencil aur PPD Se Balls Banana

Ab aate hain main mudde par: IC Reballing Kaise Karein (Balls making process). Yahan ek secret trick hai:

1. PPD Drying Trick: Dibbi se nikaala hua PPD geela hota hai. Usey pehle Tissue Paper par ragad kar uska extra flux sukha lein. Soojha hua (Dry) PPD perfect balls banata hai aur ubalta (boil) nahi hai.
2. Applying PPD: IC ke upar Stencil match karein aur PPD paste lagayein. Kapde se pochna na bhoolein taaki paste sirf chhedon mein rahe.
3. Heating: Hot Gun ko 250°C – 300°C par karein aur Air bilkul kam (1-2) rakhein.
4. Formation: Jaise hi heat lagegi, PPD pighal kar chandi jaisi chamakdar balls ban jayega.

Step 5: Installation (Wapas Lagana)

Reballing ho gayi, ab IC ko wapas board par lagana hai.

1. Flux: Board par bilkul halka (naam-matra) flux lagayein. Zyada flux se IC tairne (float) lagegi.
2. Alignment: IC ka Dot (Pin 1) aur Board ka nishan match karke rakhein.
3. Final Heat: 350°C par heat dein.
4. The Dance: Jab solder pighlega, IC halki si hilegi aur surface tension ki wajah se apne aap sahi jagah baith jayegi.

Conclusion

Ant mein, main yahi kahoonga ki IC Reballing Kaise Kare ye seekhna ek din ka kaam nahi hai. Yeh ek “Art” (Kala) hai. Shuru mein balls judengi, stencil fulegi, lekin ghabrana nahi hai. Scrap board par practice karte rahein. Jis din aapne ek baar mein perfect reballing kar li, us din aap ek professional technician ban jayenge.

Summary Checklist

1. PPD Trick: Hamesha tissue par sukha kar (Dry PPD) use karein.
2. Wick Wire: Board par ragadein nahi, pyaar se chalayein.
3. Stencil: Saaf honi chahiye, chhed band na hon.
4. Air Flow: Reballing karte waqt hawa (Air) kam (1-2) rakhein taaki balls udein nahi.
5. Focus Keyword: IC Reballing Kaise Kare ki practice scrap board par zaroor karein.

💡 Aaj Ka Aapka Task – Lesson 36 (Comments & Forum)

1. Practical: Kisi bhi kharab board ki Power IC nikaal kar sirf Cleaning ki practice karein (Reballing mat karein, bas cleaning seekhein).
2. Comment (नीचे): Kya aapne pehle kabhi IC Reballing Kaise Kare topic par koi video dekhi thi jo samajh nahi aayi? Apni problem comment karein.
3. Forum: Apni reball ki hui IC ki photo Forum (forum.teamtw.in) par share karein.

Agla Lesson: Reballing seekh li! Ab hum alag-alag ICs ko test karenge. Sabse pehle phone ka “Dil”. Agla Lesson hai: “Lesson 37: Power IC Testing & Fault Finding (PMIC Diagnosis)”।