Скачать или смотреть Xiaomi Redmi 14C Network Problem Solution | No Signal | SIM Not Working Hardware Repair

📱 Xiaomi Redmi 14C Network / Signal Problem Complete Hardware Solution

In this video, you will learn how to fix Xiaomi Redmi 14C network problems such as no signal, emergency calls only, SIM not detected, weak signal, searching network, network drop, no service, and baseband issues.

This board-level repair tutorial explains:
• SIM & antenna line testing
• RF signal path diagnosis
• Network IC & PMIC voltage checks
• Antenna switch & coax problems
• IMEI & baseband hardware verification
• Step-by-step multimeter testing

Perfect for mobile repair technicians and YouTube hardware channels targeting US, UK, Europe & Asia.

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Xiaomi Redmi 14C Network Solution Step by Step

⚡ Xiaomi Redmi 14C Network Voltage Reference
Section Voltage
SIM VCC 1.8V / 3.0V
SIM CLK Pulsating
SIM DATA Pulsating
Antenna Switch 1.8V
RF Supply (VDD_RF) 1.3V – 2.8V
PA Supply 3.7V – 4.4V
Baseband Enable 1.8V

⚠️ Values may vary by board revision.

🛠️ 30 Step-by-Step Network Repair Guide

Insert known good SIM

Check SIM detection

Dial *#06# to check IMEI

Confirm baseband present

Enable airplane mode OFF/ON

Power OFF phone

Remove back cover

Disconnect battery

Inspect SIM slot

Clean SIM contacts

Check SIM VCC voltage

Measure SIM CLK line

Measure SIM DATA line

Inspect antenna cable

Reseat antenna connector

Check antenna switch IC

Measure RF supply voltage

Inspect RF IC area

Check PA voltage

Test for short to ground

Trace network signal lines

Repair broken tracks

Replace faulty antenna cable

Replace antenna switch IC

Replace RF IC if needed

Recheck network signal

Insert SIM again

Test calling & data

Assemble phone

Confirm network working

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