Samsung SGH-E710 Service Manual page 10

6. Speaker Part
There is no sound from speaker
Is the terminal of speaker
Are there any signal
at the pin #40,42 of CN200?
YES
Are there any signal
at the pin #5,7 of U201?
YES
Pin #4 of U201
is Low?
Check U202
SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
is O.K?
YES
YES
The type of sound from
the speaker is Melody?
NO
NO
YES
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NO
NO
Are there any signal
at the pin #3,9 of U201?
NO
Check
NO
U201,
Pin #4 of U201
U303
Check U300
END
2-7
Replace the speaker
Check the LCD module
& Replace CN200
NO
YES
is High?
YES