LG LG9200, Service Manual, Page: 52 / 142

4. TROUBLE SHOOTING
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Microphone Trouble (4)
START
No
Re-solder t he R224.
A fe w hundr eds of mV
of sig nals are measu red ?
Yes
The so ld erin g of R224 is OK?
Yes
The vo lt age of R224
is 2.0V?
The MIC is out of ord er.
Change the MIC.
Conne ct the hands et to ne twor k equipme nt
and s etup c all.
No
ABB is out of orde r.
Change the board.
Check t he sig nal level at pin 1,2 of the MIC
afte r putting a udio s igna l into the MIC.
No
Re-solder t he R225,
C237, and C241.
The so ld erin g of R225,
C237, and C241 is O K?
No
Yes
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