3. TROUBLE SHOOTING
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Only for training and service purposes
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3.13.2 Speaker Trouble Shooting
It’s trouble shooting guide for no sound case.
Speaker control signals are generate by MSM8974(U3000), WCD9320(U10000)
START
Check the Speaker soundand check
Speaker wire.
End
Change Speaker.
Can you hear a sound?
2. Check
Touch FPCB part
(L200,L201) Speaker signal OK?
Change
the Touch-FPCB. Sound ok?
1. Speaker Pin is OK on the contact
point?
Change Main Board
No
Hear the sound from the Speaker?
No
No
Yes
Yes
Yes
Yes
Yes
No
No
Resetting the SPK pad according
to guide