Audio Trouble Shooting - LG U8290 Service Manual

4. TROUBLE SHOOTING

4.21 Audio Trouble Shooting

Audio & Sound Signal Path are followed as below figure.
We can check the trouble point corresponded error audio & sound mode.
Head_Set
MSM6250
(U100)
Receiver
LCD
Key PCB
AMP Module
(B'd to B'd
(U304) (B'd to B'd
Conn.)
Conn.)
Loud Speaker
MIC
Head_set MIC
Voice
Voice + MP3 + MIDI
MIDI_Bell
♣ Note : It is recommended that engineer should check the soldering of R, L, C along the corresponding path
before every step.
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