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Audio troubleshooting 3
Audio troubleshooting 3
Audio
faults 3
Is BUZZER working?
Yes
END
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Measure VBATT
No
voltage from B301.
Is it OK?
Set phone in LOCAL mode.
Use Phoenix Audio Test.
Set Buzzer volume ON.
Measure
buzzer control
signal from
BUZZER (C326)
Is it 1kHz
pulses?
Check C306,
C307, C308
and line.
IF OK –>
Change UEM
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No
Yes
Yes
No
1+0
Check VBATT
line
Change
BUZZER
(B301)
3DJH
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