In this video, we show Huawei Y7 2019 audio repair including no sound, low sound, distorted audio, loudspeaker not working and earpiece not working problems. Learn how to test speaker terminals, audio filters, PMIC sound section lines and earpiece ways. This hardware repair solution works worldwide (US / UK / Europe / Global). Follow all jumper points and board testing carefully.
30 MOST SEARCHING TITLES (Before Steps)
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30 STEP-BY-STEP REPAIR GUIDE
Power off phone.
Remove back cover carefully.
Disconnect battery.
Remove loudspeaker module.
Inspect loudspeaker contacts.
Clean contacts with PCB cleaner.
Test loudspeaker with multimeter.
Replace speaker if open or burnt.
Open upper earpiece section.
Test earpiece coil resistance.
Replace ear speaker if faulty.
Inspect speaker connector pins.
Re-solder loose pins.
Trace speaker ways to filter.
Test audio line continuity.
Replace audio filter if damaged.
Check audio output from PMIC.
Reflow PMIC audio section lightly.
Play sound to check output voltage.
Check if sound increases with new speaker.
Inspect board for liquid damage.
Remove corrosion if present.
Reassemble speaker module.
Connect battery and power on.
Test ringtone and media playback.
Test call ear speaker audio.
Ensure no headphone stuck mode.
Restart device and test again.
Reassemble phone fully.
Repair complete ✅
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