4. TROUBLE SHOOTING
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4.17.3 Speaker/Speaker Phone path
MSM7225A LINE_OP, LINE_ON -> C6014,C6015(TP1) -> M6001TPA2055D3 :
Audio Subsystem)-> FB9003, FB9004(TP2) -> CN11002
Yes
No
START
END
Connect the phone to network
equipment and set-up call.
Set-up 1KHz tone out.
No
Yes
Re-contact or Change the SPK/RCV module
No
Change the SPK/RCV module
Yes
Change the U2001 or
Change the main PCB
Can you hear the 1KHz TONE?
The Sine wave appears at
C6014,C6015 pad(TP1)
The Sine wave appears at
FB9003, FB9004(TP2)?