4. TROUBLE SHOOTING
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Only for training and service purposes
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4.19.3 Speaker/Speaker Phone path
MSM7225A HPH_R, HPH_L -> C4062, C4042(TP3) -> U4001 (PM8029 : PMIC)
-> FB4001, FB4000 (TP2) -> CN7000 (TP1) (SPK Pad)
Yes
No
START
END
Yes
No
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
Change the U4000 (PMIC)
Yes
Change the U2000 (MSM7225A) or
Change the main PCB
Can you hear the 1KHz TONE?
The Sine wave appears at
CN7000 (TP1)
The Sine wave appears at
FB4001, FB4000(TP2)?
The Sine wave appears at
C4062, C4042(TP3)?