LG MG370 Service Manual page 59

4. TROUBLE SHOOTING
Checking Flow
LGE Internal Use Only
Start
Check the voltage level of
U101ís C127 = Vbat?
Yes
Check the Signal,
R109,R110
Yes
Check the Level of
R117 = Low ?
Yes
Check the Signal,
FPCB speaker solder
Yes
Check the Contact
Of CN200
Yes
Replace FPCB
- 58 -
No
Check
The battery
No
Check
U103
No
Check
U103
No
Re-solder
Speaker wires
Re-Assemble
No
or Re-place
Speaker
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