Advertisement
No/Low sound from Speaker
Set the phone as
normal mode
No sound or noise
check if there's the ring is
normal
YES
YES
The phone is in
Silent mode.
NO
Check if the volume
is in lowest mode.
NO
Turn on the speaker,
measure the wave
signal by oscillograph
NO
Replace U0100
IQ449 service manual
Remove the speaker and
NO
measure with multimeter to
see if there's any sound.
YES
NO
Replace speaker.
YES
Turn up the volume.
Advertisement
