This is the Samsung GT-S5250 classic solution for earpiece speaker problem, if there is no voice can be heard during a call conversation. This may help to fix the problem if you already replace the speaker or confirmed that it is still working.
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If the speaker is okay, clean the speaker terminal contact pads on the PCB board. Check the filter coils and ESD protection diodes,.. clean, re-solder it or replace if found damaged.
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Note: Every diagram we post on MobileRdx.com is tested by one or more members of our team. Still Use them at Your Own Risk we are not responsible if these solutions may cause any harm to your phone.
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