Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 5 – PCB Kya Hai? hai.
Pichle Lesson 4 mein humne phone ke Citizens yaani Basic Components (Resistor, Capacitor, ICs) ko pehchanna seekha.
Ab sawaal yeh hai ki yeh laakhon components rehte kahan hain? Vo ek-doosre se baat kaise karte hain?
Iska jawab hai: PCB. (PCB Kya Hai?)
Agar mobile phone ek Country hai, toh PCB us desh ka Map aur zameen hai। Aam bhasha mein, hum ise hi “Motherboard” kehte hain.
1. PCB Kya Hai ? (PCB Full Form)
PCB ka full form hai Printed Circuit Board (प्रिंटेड सर्किट बोर्ड)।
- Printed: Kyonki is par Copper ki patli-patli Lines (jo wire ka kaam karti hain) “print” ki jaati hain.
- Circuit: Kyonki yeh lines sabhi components ko jodkar ek poora “circuit” banati hain.
- Board: Kyonki yeh ek sakht board hota hai jo current ko pass nahi karta (Non-conductive), sirf raasta deta hai.
2. PCB Ek “Multi-Storey Building” Hai
Mobile ka PCB koi simple board nahi hai. Ise aap ek “Multi-Storey Building” ki tarah samjho.
- Aapko components sirf “Ground Floor” (neeche ki layer) aur “Top Floor” (upar ki layer) par dikhaai dete hain.
- Lekin in components ko jodne wale hazaaron raaste yaani Tracks, is building ke “beech ke floors” yaani Inner Layers mein chhipe hote hain.
- Ek modern smartphone ka motherboard 8 se 12 layer tak ka ho sakta hai! Yahi wajah hai ki agar motherboard beech se toot jaye, toh usey jodna namumkin hota hai.
3. PCB Par Yeh Zaroori Cheezein Kya Hain?
Jab aap kisi motherboard ko microscope ya dhyan se dekhte hain, toh aapko yeh 4 cheezein dikhaai dengi: (Microscope ki jagah aap apne phone me Microscope HD zoom camera app install karke use kar sakte hai
- Tracks (ट्रैक्स): Yeh chamakdaar Copper ki patli Roads si hain jo current aur signal ko ek component se doosre tak le jaati hain. Agar yeh toot jaayein, toh hum “Jumper” lagate hain.
- Pads (पैड्स): Yeh component ka “parking spot” hain. Yeh track ka vo khula hissa (Golden/Silver dot) hai jahan component ko solder kiya jaata hai.
- Vias (वियास): Yeh chhote-chhote Holes hote hain. Jaisa ki humne kaha, PCB ek multi-layer building hai. “Vias” us building ki “Lift (Elevator)” hain, jo ek track ko “Top Floor” se “Inner Layer” (andar ki parat) tak le jaati hain.
- Ground (GND – ग्राउंड): Yeh PCB ka vo bada hissa hota hai (aksar baahari kinaara ya badi khaali jagah) jo poore circuit ke liye common Negative (-) point ka kaam karta hai. (Humare Multimeter ki kaali (-) probe humesha yahin rakhi jaati hai).
- Solder Mask (हरा/नीला रंग): Aapne dekha hoga ki board aksar Hara, Neela ya Kaala hota hai. Yeh ek “Paint” hai jise Solder Mask kehte hain. Yeh tracks ko aapas mein short hone se bachata hai.
Conclusion (निष्कर्ष)
Aaj aapne us “zameen” ko samajh liya hai yaani PCB Kya Hai. jis par poora phone bana hai. lesson 4 me Aapne components aur is lesson me unke ghar dono ko dekh liya hai.
💡Aaj ka Aapka task – Lesson 5 – (Comments & Forum)
Ab waqt hai theory ko practical mein badalne ka!
- Homework (होमवर्क): Apna puraana practice wala motherboard (PCB) lein. Us par Tracks (patli lines), Pads (jahan component baithte hain), aur Ground (bada metal ka area) ko dhoondhne ki koshish karein.
- Comment (नीचे): Kya aapne “Vias” (chhote chhed) ko board par dhoondh liya? Neeche comment mein “Yes, Found it!” likhein.
- Forum (सवाल-जवाब): Agar aapko PCB ki layers samajhne mein dikkat ho rahi hai, toh humare Forum (forum.teamtw.in) par poochein!
Agla Lesson: Ab jab hum “shehar” (PCB) dekh chuke hain, toh agle lesson mein hum is shehar ke “VVIPs” (sabse zaroori ICs) se milenge। Humara agla lesson hai: “Lesson 6: Mobile Motherboard ICs Explained: Types, Pinout & Identification”।
