Wi Fi and Bluetooth Problem Solution : Greyed Out & Weak Signal Fix | Lesson 24

Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 24 hai.

Pichle lesson mein humne Network problem solve ki thi. Aaj hum Wi Fi and Bluetooth Problem Solution par baat karenge.

Wi Fi and Bluetooth Problem Solution: Greyed Out & Weak Signal Fix

Ek raaz ki baat: 99% Smartphones mein Wi-Fi aur Bluetooth ki IC EK HI hoti hai (Ise WCN ya Combo IC kehte hain). Isliye agar Wi-Fi kharab hai, toh aksar Bluetooth bhi kaam nahi karega.

Grahak ki 2 main shikayatein hoti hain:

1. Greyed Out: Wi-Fi button ON hi nahi ho raha (Wapas band ho jaata hai).
2. Weak Signal: Router ke paas baithne par hi chalta hai, door jaate hi band.

Step 1: MAC Address Diagnosis (Sabse Pehla Kadam)

Phone kholne se pehle, yeh confirm karna zaroori hai ki fault IC mein hai ya Antenna mein. Iske liye hum MAC Address check karte hain.

• Check: Settings > About Phone > Status mein jaayein aur Wi-Fi MAC Address dekhe.

Result:

• Unavailable / 02:00:00: Agar address nahi likha hai, iska matlab CPU WCN IC ko padh nahi pa raha. Yeh Hardware IC Fault hai (Greyed Out problem).
• Random Numbers (e.g., a1:b2…): Agar address aa raha hai, iska matlab IC theek hai. Problem Antenna (Weak Signal) ya Software mein hai.

Step 2: Weak Signal Solution (Antenna Repair)

Agar MAC Address aa raha hai par signal kamzor hai (sirf 1 danda), toh IC ko mat छेड़ो.

1. Antenna Location: Wi-Fi ka antenna aksar board ke Upar (Top) hisse mein hota hai.
2. Cleaning: Check karein ki board ke upar wale Steel Clips body (Back panel) ke antenna sticker se touch ho rahe hain ya nahi.
3. Carbon: Clips par carbon aa jaata hai. IPA se saaf karein aur clips ko thoda upar utha dein (Bend karein).

Step 3: Wi-Fi Not Turning On (IC Voltage Check) – [Hot Testing]

Agar MAC Address “Unavailable” hai aur button Greyed Out hai, toh hamein WCN IC check karni hogi.

WCN IC ko chalne ke liye 3 Cheezein milni chahiye:

1. VBAT/VPH (Main Power): 3.7V – 4.2V (Direct Battery se).
2. VIO 1.8V (Logic Power): Power IC se aana chahiye.
3. WLAN_EN (Enable Signal): CPU se aana chahiye.

Testing:

• Phone ON karein aur Wi-Fi on karne ki koshish karein.
• IC ke paas capacitors par 1.8V aur 3.7V check karein.
• Result: Agar voltage nahi mil raha = Power line break. Agar voltage mil raha hai = IC kharab hai.

Step 4: WCN IC Repair (Reball or Replace)

Wi-Fi ki IC aksar Glass IC hoti hai. Phone girne se iske neeche ke balls Dry Solder ho jaate hain.

• Solution 1 (Reball): IC ko nikaalein, Reball karein aur wapas lagayein. 80% phones mein Reballing se kaam ban jaata hai.
• Solution 2 (Replace): Agar reballing se na ho, toh nayi IC lagayein (Number same hona chahiye).

Summary Checklist

1. MAC Address check karein (Unavailable = IC Fault).
2. Weak Signal: Top Antenna clips aur Back Panel sticker check karein.
3. Greyed Out: WCN IC ke paas 1.8V & 3.7V check karein.
4. Final Fix: WCN IC ko Reball ya Replace karein.

💡 Aaj Ka Aapka Task – Lesson 24 (Comments & Forum)

1. Practical: Apne phone mein Settings > About mein jaakar apna Wi-Fi MAC Address note karein.
2. Comment (नीचे): Kya aapko pata hai ki Wi-Fi IC aur Bluetooth IC ek hi hoti hai? Yes/No likhein.
3. Forum: Agar Wi-Fi IC change karne ke baad bhi “Unavailable” aa raha hai, toh voltage reading Forum (forum.teamtw.in) par share karein.

Agla Lesson: Connectivity poori hui! Ab hum “Multimedia” section shuru karenge. Sabse pehle sunenge awaaz. Agla lesson hai: “Lesson 25: Audio Problem Solution (Mic, Speaker, Receiver Repair)”।