Troubleshooting
Bottom Speaker
Symptom
Potential
Root Cause
Procedure
T023: Bottom Speaker no
sound
T024: Bottom Speaker low
sound
T025: Bottom Speaker
distorted sound
Mesh not clean
●
Visually inspect the exterior of the phone check
for a polluted mesh on the Bottom Speaker port.
And use a soft ESD brush to remove any debris.
●
Test audio.
Internal debris
● If sound quality is still poor, inspect the mesh and
speaker with a microscope.
●
Disassemble the device and inspect the speaker.
Use an ionizing air fan to remove any debris and
test audio.
Connectivity
issue
● Check if connectivity between Bottom SPK Pad
and Logic board are normal.
● If they are not fully buckled, re-assemble and
then retest.
Connectors Location
Component issue
●
If sound quality is still poor, use a good Bottom
Speaker and Logic board to cross check with
original ones
●
Replace the defective component.
Disassembly
● Logic board
●
Bottom Speaker
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