Samsung SCH-i830 Service Manual page 40

Flow Chart of Troubleshooting
Hands-Free Stereo Headset Working
Hands-Free
Stereo Headset
SPK , MIC
& Button
All NG?
NO
Button YES
NG?
NO
MIC YES
NG?
NO
SPK YES
NG?
YES
10pin in U416
= High?
YES
Check EAR500 &
Neighboring Circuits
1pin in U508
= High?
NO
Check EAR500, U508 &
Neighboring Circuits
6pin in U507
Signal ON?
YES
5pin in U507
Signal ON?
YES
Check U501, U508
& Neighboring Circuits
39,41pin
YES
in UDC500
Signal ON?
NO
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NO 2pin in U416
= High?
YES
Change
U416
YES
Change PBA
NO
Check EAR500 &
Neighboring Circuits
NO 7pin in U508
= High?
NO
Check U508 &
Neighboring Circuits
10pin in U501
Signal ON?
Check UDC500, U501
& Neighboring Circuits
7-14
Change
NO
PBA
YES
Change U507
YES
Check U508 &
Neighboring Circuits