LG MG200 Service Manual page 62

START
The voltage of R204
is 2.5V?
Yes
Soldering between
MIC and Board
is OK?
Yes
Check the signal level at pin
1,2 of the MIC after putting au
A few hundreds
of mV of signals are
measured ?
No
The MIC is out of order.
Change the MIC.
Connect the handset to network
equipment and setup call.
No
The soldering of
Resolder the MIC
No
ABB is out of order.
Change the board.
dio signal into the MIC.
YES
of C207,C212,R206,
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4. TROUBLE SHOOTING
No
R202 is OK?
Yes
Yes
The soldering
No
and R210
is OK?
Resolder the
R202
Resolder the
C207,C212,R206
and R210