LG G5500 Manual page 79

2. Sending Path problem
The voltage at L303
is 1.1V ~ 1.3V?
Yes
A few
tens or hundreds
of mV of signals at C318
are measured ?
Yes
The ABB is out of order.
Change the board.
Set audio part of the test
equipment to the echo mode.
No
Resolder the
L303,L305
No
soldering of C318
soldering of J301
The earphone is OK?
The ABB is out of order.
Change the board.
-80-
The
is OK?
Yes
The
is OK?
Yes
Yes
No
Resolder
the C318
No
Resolder
the J301
No
Change the
Earphone.