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Flow Chart of Troubleshooting
9-19
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9-1-10 Abnormal Speaker operation
No sound on playing MP3, Key
Tone, Ring Tone
C648, C649
signal on?
Check U601 &
neighboring circuit
NO
YES
C655, C656
signal exist?
NO
Replace U602
YES
END
Change Speaker
module assay
Is Speaker
OK?
YES
NO
Check connector
HDC501
Check connector
HDC901
Normal
Normal
Reconnect HDC901
Reconnect HDC501
abnormal
abnormal