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Flow Chart of Troubleshooting
9-18
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9-9. MIC Working
Mic does not work
Is there ant signal
at C526?
Replace slide FPCB connector
No
Yes
Is there ant signal
at C526?
Is there ant signal
at C526?
Yes
No
No
Replace sub key & mic FPCB connector
Yes
The voltage of
R513 is about 1.6V?
No
Check the path around MIC bias circuit
Yes
Is there any signal
at R501,R505?
No
Check U502
Yes
END
Change MIC module
Summary of Contents for GT-B7620
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