Ear-Mic Headset Hsor/Hsol Trouble Shooting - LG KM710 Service Manual

4. Trouble Shooting

4.16 Ear-Mic Headset HSOR/HSOL Trouble Shooting

Check the resistance between
HSOUTR/L & GND of the Headset.
16 0hm ± ± 15%?
YES
Disassemble the rear case of phone.
Connect the Ear-Mic Headset to the
Ear-Mic Socket.
Did you hear TDMA noise?
NO
Check the soldering status
FB301,FB302,U604, L101,
L102, C120, C121, C125, C126,
L300, L301, C302-C305
YES
The main_PCB has a
Change the main_PCB.
LGE Internal Use Only
START
Is it O.K?
Problem,
NO
Ear-Mic Headset has a
problem.
Exchange the Ear-Mic
Headset
Re-solder C302-C305
YES
Re-solder FB301, FB302, U604,
NO
L101, L102, C120, C121, C125,
C126, L300, L301, C302-C305
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