Calling; No Voice Heard From The Other Side During The Call - Lenovo A516 Service Manual

Repair Manual of Lenovo A516 Mobile Phone

3.6 Calling

3.6.1 No voice heard from the other side during the call

Use earphone and hands-free to verify
whether there is voice?
Replace the headphones and then
rechek whether it is normal
Check whether B1401,B1403 are well
welded. Re-weld and test
No voice heard from the other
side during the call
Y
N
N
Replace U1301
N
Y
Y
21
Cold solder joint
of main chip or
main chip
abnormal
OK
OK
is