Itel A70 Mic Speaker Ear Speaker Problem Solution
If your Itel A70 microphone, main speaker, or earpiece speaker is not working during calls, music, or recording, this video provides a complete hardware-level solution. These issues are often due to damaged components, broken solder joints, faulty audio IC, or sub-board flex issues. Follow this step-by-step 30-point guide to test and fix all audio hardware in the Itel A70.
🔊 Common Audio Issues
No sound from bottom speaker
Caller can't hear you
You can't hear caller during a call
No sound in voice recording
Earpiece silent but phone vibrates
🧰 Tools Required
Multimeter
Soldering Iron
Hot Air Station
Microscope
IPA Cleaner
New Mic, Speaker, Earpiece (if needed)
Jumper Wire
🔧 30 Step-by-Step Instructions
Power off Itel A70
Remove back cover and SIM tray
Disconnect battery and remove sub-board
Inspect mic, speaker, earpiece flex under microscope
Clean components and connectors with IPA
Check speaker and mic mesh for dust or blockage
Replace mesh or clean thoroughly
Use multimeter to test speaker resistance (should be 27–33 ohms)
Test earpiece resistance (similar range)
Test microphone voltage (~1.8V) when powered
Check mic signal line continuity to mainboard
Jumper broken mic signal lines if necessary
Reflow or replace microphone
Inspect speaker flex and socket
Reflow or replace bottom speaker
Check earpiece signal path to audio IC
Jumper if earpiece track is damaged
Test audio IC supply voltage
Reflow or replace audio IC if signal not present
Test sub-board connector lines to mainboard
Clean and realign all connector pads
Check diode values of audio signal paths
Reball or replace audio codec IC if needed
Replace mic, speaker, or earpiece with new parts for cross-check
Use voice recorder to test mic
Make a call to test earpiece and mic
Play music to test loudspeaker
Confirm audio switching between earpiece and speaker
Assemble phone and retest
Done — Itel A70 audio problems are resolved
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