
X458 L3 Service Manual
28
No/Low sound from Speaker
YES
NO
NO
NO
YES
YES
YES
NO
NO
Set the phone as
normal mode
Turn on the speaker,
measure the wave
signal by oscillograph
No sound or noise
Remove the speaker and
measure with multimeter to
see if there’s any sound.
Replace speaker.
The phone is in
Silent mode.
Check if the volume
is in lowest mode.
Turn up the volume.
Replace U101 MT6260
Press power on and side button to
check if there’s the ring is normal
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Summary of Contents for X458
Page 13: ...X458 L3 Service Manual 13 All manuals and user guides at all guides com ...
Page 14: ...X458 L3 Service Manual 14 Output of SIM Card All manuals and user guides at all guides com ...
Page 17: ...X458 L3 Service Manual 17 Display interface All manuals and user guides at all guides com ...
Page 48: ...X458 L3 Service Manual 48 All manuals and user guides at all guides com ...