Mobile Phone Xolo Mirage Plus (Smartphone)
Service Manual
Page
22
of 40
4.5 No voice in Speaker issue analysis
No voice in
speaker
No voice in
speaker
Is audio setting normal?
Is audio setting normal?
Adjust setting
Adjust setting
Is speaker normal?
Is speaker normal?
Replace speaker
Replace speaker
End
End
N
N
N
N
Y
Y
Upgrade firmware
Upgrade firmware
Is USB sub-board FPC Or
CONN Normal?
Is USB sub-board FPC Or
CONN Normal?
Replace FPC or
CONN
Replace FPC or
CONN
N
N
Y
Y
Replace CPU U600
Replace CPU U600
Resolder or
replace U300
Resolder or
replace U300
N
N
Is power supply normal?
Y
Y
Y
Y
Figure 4.5No voice in speaker failure repair process
❶
Check whether the audio source can output from baseband chip with a headset;
❷
Then check
speaker resistance to confirm whether the resistance of Speaker is 8ohm. If not, it means the
speaker is broken. Otherwise we need to check the Audio PA circuit to find out the problem;
❸
When we solved the original issue, we can go to „Factory Mode‟ by press “Power on” key,
volume “-” key the same time;
❹
Select “15 Audio Loudspeaker” to test the speaker function.