LG MG210 Service Manual page 59

4. TROUBLE SHOOTING
START
The voltage of R211
is 2.5?
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.
Connect the handset to
network equipment and
setup call.
No
The soldering of R211
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.
YES of C225,C226,R215,
- 58 -
No
is OK?
Yes
Yes
The soldering
No
and R216
is OK?
Resolder the
R211
Resolder the
C225,C226,R215,
and R216