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LENOVO S960 Cellphone Service Manual
Check whether the connections of the
main FPC connectors are OK.
Check whether the contacts between the
speaker spring clips and the sound
chamber stand are good.
Replace speaker. Retry to see whether it
rings.
Check whether audio power amplifier U1405
on motherboard has a dry joint problem or is
damaged. Repair soldering or replace it. Try
again to see whether it rings.
Test with earphones. If there's sound in
earphones, then there is audio signal
input. Check whether the components
related to the audio power amplifier have
dry joint problems. Re-solder. Check
whether the problem is fixed.
Check PMU chip U1301. If it's damaged,
replace it.
It does not
ring.
N
N
N
N
N
Page 15
Y
OK
Y
Replace the sound
chamber stand.
Y
OK
Y
OK
Y
OK
Y
OK
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