Samsung GT-S3370 Service Manual page 41

9-1-7. SPK Part
There is no sound from the Buzzer
Is the terminal of Speaker
On playing MP3,
Is there any signals(Bias1.0V)
at the SPK_OUT_P(C531)
and SPK_OUT_N(C533)?
On playing MP3,
Is there any signals(Bias1.0V)
at the SPK_P(L506) and
Yes
O.K ?
Yes
YES
SPK_N(L507)?
YES
END
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No
Replace the Speaker module
No
Check UCP300
No
Check U502 & VPH_PWR
& VREG_MSMP_2.6V
9-13
Flow Chart of Troubleshooting