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9-1-6. Speaker Part
There is no sound from speaker
The terminal of Speaker
is OK ?
U302's #4 is high ?
Is there any signal
C386 ?
The pin #32 of U301
The pin #7 of U301
Are there any signal in
pin #29 of U301
END
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YES
YES
YES
2.7V
≒
2.7V ?
=
YES
YES
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Flow Chart of Troubleshooting and Circuit Diagrams
NO
Replace the Speaker
NO
Check the UCP101
NO
Check the U301, UCP101
NO
Check the U501
NO
Check the UCP101
9-12
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