No Voice Heard From Your Side During The Call - Lenovo A516 Service Manual

Repair Manual of Lenovo A516 Mobile Phone

3.6.2 No voice heard from your side during the call

Check whether MIC and the peripheral devices are
well welded; whether it is ok after re-welding?
Whether it is ok after replacing SUB
board?
Whether it is ok after replacing main
FPC?
Check whether MIC module device is well
welded. Re-welded this device and see whether it
is ok?
No voice heard from your side during the call
N
N
N
N
Check U1301
22
Y
Re-weld
Y
ＯＫ
Y
Y
OK