FLY IQ449, Service Manual

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IQ449 service manual
No/Low sound from Speaker
No sound or noise
check if there’s the ring is
NO
normal
Remove the speaker and
measure with multimeter to
see if there’s any sound.
YES
YES
YES
Set the phone as The phone is in
normal mode 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
NO
Replace speaker.
YES
Turn up the volume.
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