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Flow Chart of Troubleshooting
9-14
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Hands-Free Stereo Headset Working
Hands-free stereo
headset
NG
YES
Check U707 & U600
Button NG?
NO
Check
R606 = 1.8V?
MIC NG?
NO
YES
Check U703
YES
NO
Signal on
in C601,
C605?
SPK NG?
YES
YES
Check U707 & U600
NO
Signal on
in C508,
C509?
YES
Check U500
NO
Change Main PBA
The End
NO
Check U707 & U600