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4. TROUBLE SHOOTING
4.17.3 Loud Speaker path(voice speaker phone, VT, multimedia play, etc)
Loud speaker path as below:
MSM6275 HPH_L -> C623 -> R630 -> U301(amp) ->
U300(Receiver/Speaker switch) -> CN501 -> LCD FPCB -> Speaker
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Set phone with speaker Phone mode
Start
The sine wave appear at
C623?
YES
The sine wave appear at
R630?
YES
The sine wave appear at
VA519, VA520?
YES
The sine wave appear at
Speaker side in FPCB
YES
Can you hear the tone?
YES
END
NO
Change the Main board
NO
Check C623,R630 or
Change the Main board
NO
Check U300,U301
NO
Check the connector or
Change the FPCB
NO
Change the speaker
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Table of Contents
Troubleshooting
