Samsung SGH-i560V Service Manual page 65

9-1-7 : Abnormal Voice Call operation
No sound on calling
C635 Both side
output exist?
Is MIC
PCM CLK, SYNC,
DOUT output=exist?
C652, C653
output=exist ?
Is Receiver
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YES
OK?
YES
YES
YES
OK?
YES
END
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NO Check U603 or MICBIAS
Voltage, neighboring
NO
or Replace MIC Fpcb
NO
Check U601, U602
and neighboring circuit
NO
Check U602
NO Check Fpcb or Resolder
Receiver, Replace
9-21
Flow Chart of Troubleshooting
circuit
Resolder
Receiver