LG CE110 Service Manual page 85

4. TROUBLE SHOOTING
START
The voltage of L500
is 2.5V?
Yes
Soldering between
MIC and Board
is OK?
Yes
A few hundreds
of mV of signals are
Measured ?
No
The MIC is out of order.
Change the MIC.
LGE Internal Use Only
Connect the handset to
network equipment and
setup call.
No
The soldering of L500
ABB is out of order.
Change the board.
No
Resolder the MIC
Check the signal level at pin
1,2 of the MIC after putting
audio signal into the MIC.
The soldering
YES of R127,R128,C107,C108
and L501,C506
- 86 -
is OK?
Yes
Yes
No
R127,R128,C107,C108
is OK?
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Only for training and service purposes
Resolder the
and L501,C506