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Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 13 – DC Power Supply Ka Use : Dead Mobile Repair & Shorting Check hai.
Pichle lessons mein humne Tools aur Testing seekh li hai. Ab maan lijiye aapke paas ek Dead Phone aata hai. Grahak kehta hai “Phone chalu nahi ho raha”.
Ab aap kya karenge? Sirf battery badal kar dekhna kaafi nahi hai.
Ek professional technician “DC Power Supply” (DC Machine) ka use karta hai. Yeh machine phone ka “X-Ray” hai. Yeh phone ke andar daudne wale “Current” (Ampere) ko dekhkar bata deti hai ki phone mein Software ki dikkat hai ya Hardware ki.
Aaj hum seekhenge: DC Machine Settings, Boot Cables, aur Dead Phone ki Jaasoosi.
1. DC Power Supply Kya Hai? aur DC Power Supply Ka Use.
Yeh ek “Artificial Battery” hai jo AC current ko DC (3.7V – 4.2V) mein badalti hai. Mobile repairing ke liye hamein ek 30V 5A machine ki zaroorat hoti hai.
Kyon 30V 5A Machine Best Hai?
- OVP (Over Voltage Protection): Ismein protection hoti hai jo galti se high voltage jaane par phone ko jalne se bachati hai.
- 5 Ampere Power: Yeh Shorting (Full Short) nikaalne ke liye kaafi taqatwar hoti hai. Purani 2 Ampere machines se shorting pata nahi chalti.
- Laptop Repair: Isse aap future mein Laptop bhi repair kar sakte hain.
Best Model: Sugon 3005D ya Korad KA3005D. (Price: ₹4000+ approx). [Link]
2. Boot Cables (Bina Battery Phone ON Karna)
Naye Android aur iPhones purane “Chimti” (Alligator Clips) se ON nahi hote. Unhein ID aur Thermal line chahiye hoti hai. Isliye hum “Boot Cables” (Power Boot Cable) ka use karte hain.
- Kaam: Iska ek sira DC machine mein lagta hai aur dusra sira phone ke battery connector par. Isse phone ko lagta hai ki asli battery lagi hui hai.
- Price: Achhi quality ki boot cable (Mechanic/Sunshine) lagbhag ₹1000 ki aati hai.
3. Step 1: DC Power Supply Ka Use – Shorting Check Karna
Phone connect karte hi (Power button dabane se pehle) Machine ki reading dekhein:
- Full Shorting:
- Reading: Voltage 0 ho jaata hai aur Ampere Full (5A) ho jaata hai. Machine “Beep” (Cut-off) karti hai.
- Matlab: VBUS ya VBAT line mein koi bada component short hai.
- Half Shorting (Leakage):
- Reading: Bina button dabaye machine kuch current (0.010A – 0.400A) lene lagti hai.
- Matlab: Phone band hone par bhi battery kha raha hai. Power IC ya Network section mein leakage hai.
4. Step 2: DC Power Supply Ka Use – Dead Phone Diagnosis (Reading Codes)
Agar shorting nahi hai, toh Power Button dabayein aur Ampere ki sui (Reading) ko dekhein. Yahi asli skill hai:
| Reading (Ampere) | Fault Kahan Hai? (Diagnosis) |
| 0.000 (No Movement) | Power Button kharab hai, Rasta toota hai, ya Battery Connector loose hai. |
| 0.000 -> 0.050 -> 0.000 | Power IC OK hai, lekin CPU start nahi ho raha (Dry solder/Dead). |
| Stuck at 0.080 – 0.150 | eMMC / Storage Fault. Software load nahi ho pa raha hai. Computer se connect karke port check karein. |
| Stuck at 0.200 – 0.400 | Power/Secondary Line Shorting. Power IC ke baad wale hisse mein shorting hai (Buck/LDO lines). |
| Fluctuation (0.200 -> 0.800) | Phone OK hai! Agar reading upar-neeche (fluctuate) ho rahi hai, toh phone ON ho gaya hai. Shayad Display kharab hai ya Light nahi aa rahi. |
Conclusion (निष्कर्ष)
DC Power Supply aapka sabse bada jaasoos hai.
- Stuck Reading = Hardware/eMMC Fault.
- Fluctuating Reading = Software/Display Fault.
- High Current = Shorting.
💡 Aaj Ka Aapka Task – Lesson 13 (Comments & Forum)
- Practical: Agar aapke paas DC machine hai, toh ek chalu (OK) phone ko connect karein aur dekhein ki ON hote waqt numbers kaise badalte hain. Ise note karein.
- Shopping: Apni lab ke liye ek 30V 5A machine aur Boot Cable zaroor order karein.
- Forum: Agar aapke paas koi dead phone hai jiski reading samajh nahi aa rahi, toh uski video banakar humare Forum (forum.teamtw.in) par “Dead Mobile Section” mein daalein.
Agla Lesson: Phone check karna seekh liya! Ab phone ko kholna (Disassemble) seekhna padega taaki andar kaam kar sakein. Agla lesson hai: “Lesson 14: Phone Disassemble aur Assemble (Phone kholne aur band karne ka sahi tareeka)”।
