Do you know how to repair Redmi speaker and handset no sound ?
Recently, some users have reported that the Redmi speaker has no sound when playing music, and there is no sound in the handset when making a call. We need to fix it. What caused the phone speaker to have no sound, how did this happen, what should we do? The following are the repair steps.
First check whether the Redmi is in headphones mode, after checking, the Redmi doesn't in headphones mode, but the speaker and handset still not working.
Disassemble the Xiaomi Redmi by phone opening tools, use digital multimeter to measure the EAR_DET voltage, after measurement, there is no voltage and it is short circuit， R1904 is short circuit.
Take out the R1904 by Precision Titanium Alloy Tweezers, we find the capacitor DCD_HS_DET is short circuit.
Check Redmi schematic diagram, we know that CDC_HS_DET leads to a Redmi power supply IC. Test the Redmi, we find the power supply IC is overheat, replace the new Redmi power supply IC.
Now find a 2.2K (222 capacitor), and then replace the R1904 capacitor, use QUICK 861DW hot air rework station to solder it with jump wire.
Soldering the Redmi power supply IC, and then turn on Redmi to test, EAR_DET headphone detection voltage 1.8V is normal, Disconnect the power, and then install the Redmi, after testing, the headphone speaker and handset all works properly, the repairs end!
Are you interested in this article？Do you want to learn more mobile phone repair skills? Please don't hesitate to contact us on www.vipfixphone.com.
First check whether the Redmi is in headphones mode, after checking, the Redmi doesn't in headphones mode, but the speaker and handset still not working.
Disassemble the Xiaomi Redmi by phone opening tools, use digital multimeter to measure the EAR_DET voltage, after measurement, there is no voltage and it is short circuit， R1904 is short circuit.
Take out the R1904 by Precision Titanium Alloy Tweezers, we find the capacitor DCD_HS_DET is short circuit.
Check Redmi schematic diagram, we know that CDC_HS_DET leads to a Redmi power supply IC. Test the Redmi, we find the power supply IC is overheat, replace the new Redmi power supply IC.
Now find a 2.2K (222 capacitor), and then replace the R1904 capacitor, use QUICK 861DW hot air rework station to solder it with jump wire.
Soldering the Redmi power supply IC, and then turn on Redmi to test, EAR_DET headphone detection voltage 1.8V is normal, Disconnect the power, and then install the Redmi, after testing, the headphone speaker and handset all works properly, the repairs end!
Are you interested in this article？Do you want to learn more mobile phone repair skills? Please don't hesitate to contact us on www.vipfixphone.com.
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