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