Receiver Trouble Shooting - LG L240 Service Manual

4. TROUBLE SHOOTING

4.11 Receiver Trouble Shooting

Disassemble the upper case of phone.
Check the resistance between
SPK_P & SPK_N of the Receiver
With the DVM ~ 32 ohm
Disconnect the F-PCB from
the Main Board.
Check the cutting of F-PCB
With the DVM 0 ohm
Check the soldering status
Of L601,L602
Check the RCV_N, RCV_P
Check the Speaker
contact PAD of the F-PCB
START
YES
Is it O.K?
YES
Play the Ring tone.
The signal is a analog
YES
- 78 -
C620 C621
L601L602
NO
Receiver has a
problem.
Replace the Receiver.
NO
F-PCB has a problem,
Change the F-PCB
NO
Re-solder L601,L602
NO
U101(ABB) is broken.
Change the board.