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Flow Chart of Troubleshooting
9-6. Speaker Part(Melody)
Speaker does not work
U600(Melody IC) pin7&32
Check the Clock signal at
Pin 1 of U600(12.5MHz)
U600 pin4 ≒ 2.8V?
U600 pin15 ≒ Battery
Is speaket working?
Yes
= 2.8V?
Yes
Yes
Yes
Volt?
Yes
END
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No
Resolder or replace U502(PMIC)
No
Check the clock generation circuit
(related to U502 and U600)
No
Resolder UCP300(MSM6250A)
No
Check the circuit related to "pin17&
No
Change the speaker
9-12
18 signal"
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