Samsung SCH-i830 Service Manual page 46

Flow Chart of Troubleshooting
7-1-6. SD-Card Working
Insert SD-Card &
Operate SD-Card
NG
Break a CD702?
NO
12pin in CD702
= High
YES
4pin in U410
= High
NO
1pin in U410
= High
NO
Change PBA
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YES
Change CD702
NO
Check
&
CD702 R746
YES
Check CD702
neighboring circuits
YES
Change U410
7-20
& it's