Speaker/Receiver Trouble Shooting (Acoustic Path) - LG KE520 Service Manual

4. TROUBLE SHOOTING

4.11 Speaker/Receiver Trouble Shooting (Acoustic Path)

Disassemble the slide case of phone.
Check the soldering state of
L202,L203,C220,C221,C223
@MAIN_PCB
C10,C11,C12,VA2,VA3
@MAIN_FPCB
Disconnect the F-PCB from
the Main Board.
Check the cutting of F-PCB
With the DVM 0 ohm
YES
Play the Key tone.
Check the RCV_N, RCV_P
The signal is a analog
YES
Check the Speaker
contact PAD of the F-PCB
LGE Internal Use Only
START
NO
YES
NO
NO
- 96 -
Receiver has a problem.
Replace the Receiver.
F-PCB has a problem,
Change the F-PCB
U102(ABB) is broken.
Change the board.
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