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SGH-Z130 Flow Chart of Troubleshooting and Circuit Diagrams
2-
12
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2-1-6. Speaker Part
There is no sound from speaker
Check the wave of
the pin of U301's clock
≒
19.2MHz ?
NO
Check OSC801 and
U802
The pin #32 of U301
≒
2.6V
The pin #15 of U301
≥
3.3V ?
NO
Check the U500
YES
YES
Are there any signal
at the pin #4 of U301?
YES
Are there any signal
at the pin #1,2 of CN502 ?
YES
END
Check the U301
Check the U302
Replace the speaker
NO
NO
NO
YES
Is speaker working