Samsung SGH-X430 Service Manual page 30

7. SGH-X430 Flow Chart of Troubleshooting
6. Speaker Part
There is no sound from Speaker
Yes
The pin#4 of
U1001 is
"Low"
No
Check U1001
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Is the terminal of Speaker
O.K.?
Yes
Are there any signals
at the pin #20 of CN700,
pin #19 of CN700
The type of sound
from the Speaker is
Yes
Is there any signals
at the pin#5 and
pin#7 of U1001?
Yes
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No
No
Yes
Melody
Is there any signals
at the pin#2 and
pin#10 of U1001?
No
No
Check U1000
END
7-7
Replace the Speaker
Check LCD or Replace CN700
No
Yes
Yes
The pin#4 of
U1001 is
"High"
Check U500
No