Team Tekno World ke free mobile repairing course mein aapka swagat hai! Main hoon Rakesh Chauhan, aur yeh humara Lesson 23 hai
Aaj hum mobile repairing ke sabse complex topic Network Problem Solution par baat karenge.
Grahak ki shikayat: “Bhaiya, sim nayi hai par ‘No Service’ aa raha hai,” ya “Signal aata hai, jaata hai,” ya “Sirf Emergency Calls Only dikha raha hai.”
Network section samudra jaisa gehra hai. Lekin agar aap Step-by-Step chalenge, toh aap WTR badalne se pehle hi fault pakad lenge. Aaj hum seekhenge Manual Search Trick, Antenna Wire, aur WTR/PA IC Diagnosis.
Step 1: Software & Baseband Check (Bina Khole)
Kisi bhi Mobile no service fix se pehle, yeh confirm karein ki yeh Hardware fault hai ya Software.
- IMEI Check: Dial karein
*#06#. Agar IMEI aa raha hai toh acchi baat hai. AgarNullyaInvalidhai, toh yeh Software fault hai. - Baseband Check:
Settings > About Phonemein Baseband Version check karein.- Agar “Unknown” hai = CPU aur Network IC ka connection toot gaya hai. (Reballing karni padegi).
- Agar version likha hai = Hardware checking shuru karein.
Step 2: Manual Network Search (Sabse Bada Raaz)
Phone kholne se pehle, Settings > Mobile Networks > Network Operators mein jaakar “Search Manually” karein. Iska result aapko Network Problem Solution ka raasta dikhayega:
| Result (Screen par kya aaya?) | Diagnosis (Kharabi kahan hai?) |
| Error while searching (Turant error aa gaya) | WTR IC (Transceiver) kharab hai ya usse voltage nahi mil raha. |
| List aa gayi, par Select karne par “Failed” | PA (Power Amplifier / PFO) kharab hai. Signal pakad raha hai par register nahi kar pa raha. |
| No Networks Found (Der tak ghoomta raha) | Antenna Wire ya Antenna Switch ka rasta toota hai. |
Step 3: Physical Check (Antenna Wire & Switch)
Agar “No Networks Found” aaya tha, toh physical damage check karein:
- Phone kholein.
- Coaxial Cable (White/Black wire) ko check karein jo Main Board se Sub-board tak jaati hai.
- Kya uska connector loose hai? Kya wire kahin se kati hai?
- Continuity: Multimeter (Beep Mode) se wire ke beech wale point ki continuity check karein.
Antenna Switch Jumper: Agar connector ke paas laga Antenna Switch kharab hai, toh signal block ho jata hai. Aap ise hata kar Direct Jumper maar sakte hain.
Step 4: Voltage Check (WTR & PA IC Repair) – [Hot Testing]
Agar Manual Search mein “Error” aa raha hai, toh hamein WTR IC check karni hogi.
- WTR IC (Transceiver):
- Yeh network ka “Radio” hai (Common IC: WTR 2965). Ise kaam karne ke liye 1.0V aur 1.8V chahiye hota hai.
- Check: WTR ke paas capacitors par 1.0V aur 1.8V check karein (Sim lagakar phone ON karein).
- Fix: Agar voltage hai par network nahi, toh WTR Change karein. (Yeh glass IC hoti hai, heat dhyaan se dein).
- PA / PFO (Power Amplifier):
- Yeh network ka “Muscle” hai. Ise seedha battery se power milti hai.
- Check: PA ke paas bade capacitor par VPH/VBAT Voltage (3.7V – 4.2V) check karein.
- Fix: Agar voltage nahi aa raha, toh supply line (Coil/Fuse) tooti hai.
Summary Checklist (Flowchart)
- Baseband/IMEI check karein (Unknown = CPU/Software).
- Manual Search karein.
- Error = WTR IC Fault.
- Select Fail = PA (PFO) Fault.
- No Network = Antenna/Wire Fault.
- WTR change karein (Aajkal 80% phones mein yahi kharab hoti hai).
💡 Aaj Ka Aapka Task – Lesson 23 (Comments & Forum)
- Practical: Apne phone mein Manual Search karke dekhein. Kya list aati hai? (Airtel, Jio, Vi). Agar haan, toh apka network section OK hai.
- Comment (नीचे): Kya aapne kabhi WTR 2965 badli hai? Yeh sabse common IC hai.
- Forum: Agar Manual search mein error hai, toh WTR ke aas-paas voltage check karke photo Forum (forum.teamtw.in) par daalein.
Agla Lesson: Network toh aa gaya, lekin “Wi-Fi aur Bluetooth” connect nahi ho rahe? Agla lesson hai: “Lesson 24: Wi-Fi & Bluetooth Problem Solution (WCN IC Repair)”।
