Lenovo S960 Руководство по эксплуатации - Страница 14

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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 analog switch U1403 on

motherboard has a dry joint problem or is

damaged. Repair soldering or replace it.

Try again to see whether it rings.

Check whether audio power amplifier U1401

on motherboard has a dry joint problem or is

damaged. Repair soldering or replace it. Try

again to see whether it rings.

Check PMU chip U1301. If it's damaged,

replace it.

3.3.2.2 SN audio power amplifier

It does not ring.

Page 14

Replace the sound chamber stand.