Only For Training And Service Purposes - LG MG295 Service Manual

4. TROUBLE SHOOTING
Checking Flow
LGE Internal Use Only
START
Check the state of
contact of speaker
Yes
Check the Audio signal
R413,R415
Yes
Check the Power voltage
U403 = VBAT
And work properly ?
Yes
Check the Power voltage
U404 = VBAT
And work properly ?
Yes
Speaker
Working well!!
- 64 -
No
Replace/Change speaker
No
Change the U103
No
Change the U403
No
Change the U404
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Only for training and service purposes