Multimeter Ka Use Kaise Kare? (Mobile Repairing Ka Doctor) | Lesson 9

Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 9 -Multimeter Ka Use Kaise Karein? hai.

Pichle lesson mein humne ESD Safety samjha tha. Aaj hum apne sabse khaas dost aur mobile repairing ke sabse zaroori tool ke baare mein jaanenge: Digital Multimeter.

Multimeter Ka Use Kaise Kare?

Jaise ek Doctor mariiz (patient) ko sirf door se dekhkar yeh nahi bata sakta ki usey kya beemari hai (usey Stethoscope ya X-Ray chahiye hota hai), waise hi hum mobile ko sirf dekhkar fault nahi pakad sakte. Hamein Multimeter chahiye.

Aaj hum seekhenge ki is “Doctor” (Multimeter) ka istemaal kaise, kahan aur kyun kiya jaata hai.

1. Multimeter Kya Hai?

“Multimeter” do shabdon se bana hai: Multi (Bahut saare) + Meter (Maapne wala).

Yeh ek aisa electronic device hai jo current ki alag-alag taqat (Voltage, Resistance, Continuity) ko maapta hai.

Kaunsa Meter Lein?

Hamesha Digital Multimeter hi le (Suii wala Analog nahi). Mobile repairing ke liye Sunshine DT-17N (Auto-ranging) sabse best aur popular hai.

2. Probes Ko Sahi Jagah Lagana

Multimeter use karne se pehle taaron (Probes) ko sahi jagah lagana zaroori hai. Galat lagaya toh meter jal sakta hai.

• COM (Common) Port: Yahan hamesha Kaali (Black) wire lagti hai. Yeh Negative (-) ya Ground hai.
• VΩmA Port: Yahan hamesha Laal (Red) wire lagti hai. Yeh Positive (+) hai.
• 10A Port: (Mobile repairing mein iska use nahi hota, ise khaali chhod dein).

3. Mobile Repairing Ke 2 Sabse Zaroori Modes

Multimeter mein bahut saare numbers hote hain, lekin mobile repairing mein hum apna 99% kaam sirf 2 modes par karte hain.

A. Continuity / Beep Mode (बज़र मोड) 🔊

• Symbol: Sound wave ya Diode ka nishaan.
• Kaam: Yeh check karta hai ki track juda hua hai ya toot gaya hai.
• Test: Jab aap Laal aur Kaali wire ko aapas mein touch karte hain, toh “Beep” (Tiii… sound) aati hai.
• Iska Use:
  1. Speaker/Mic check karna: Agar beep aayi toh sahi hai (coil judi hai).
  2. Track check karna: Agar track toota hoga to beep nahi aayegi.
  3. Shorting check karna: Agar Positive (+) aur Negative (-) aapas mein beep karein, toh phone Short hai.

B. DC 20V Mode (वोल्टेज मोड) ⎓

• Symbol: V⎓ (V ke sath seedhi line aur dots). Galti se bhi V~ (AC) par mat rakhna.
• Setting: Dial ko 20V par set karein. (Auto-ranging meter mein sirf ‘V’ par rakhein).
• Kyon 20V? Kyonki mobile ki battery 3.7V se 4.2V ki hoti hai aur charger 5V ka. Yeh sab 20V se kam hain.
• Iska Use:
  1. Battery Check: Battery charge hai ya nahi.
  2. Charging Check: Charger se power aage ja rahi hai ya nahi.

4. Cold Testing vs. Hot Testing (Sabse Zaroori Concept)

Repairing ki duniya mein testing ke 2 tareeke hote hain. Inhein samjhna bahut zaroori hai:

⚠️ WARNING :

Kabhi bhi chalu phone mein (jismein battery/charger laga ho) Beep Mode par checking na karein. Isse aapka Multimeter turant jal sakta hai. Power check karne ke liye sirf DC 20V mode use karein.

Conclusion (निष्कर्ष)

Multimeter chalana mushkil nahi hai. Aapko bas “Beep Mode” (Juda hai ya nahi?) aur “20V Mode” (Power hai ya nahi?) mein master banna hai. Baaki sab hum aage seekhenge.

💡 Aaj Ka Aapka Task – Lesson 9 (Comments & Forum)

1. Practical : Apna multimeter le. Kaali wire COM mein aur Laal VΩmA mein lagayein. Beep Mode par set karein aur dono wires ko touch karke “Beep” sune.
2. Battery Check: Ghar mein koi bhi cell (Remote ka cell) ya purani mobile battery le. Meter ko DC 20V par kare aur check karein ki usme kitne Volts hain.
3. Comment (नीचे): Aapne apni battery check ki toh kitne Volt dikhaye? Comment mein likhein (Example: Mera cell 1.52V ka hai).
4. Forum: Agar meter 0 dikha raha hai ya kaam nahi kar raha, toh photo ke sath Forum (forum.teamtw.in) par help maange.

Agla Lesson: Kal hum multimeter se asli component check karenge! Agla lesson 10 hai: “Lesson 10: Multimeter Se Components Kaise Check Karein (Resistor, Capacitor, Diode Good/Bad Testing)”.