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SGH-D730 Flow Chart of Troubleshooting and Circuit Diagrams
2-
13
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2-1-5. Microphone Part
Check the reference
voltage on mic path
R221=2.4V
Reassemblage microphone
NO
resolder or change
(
R243
,
C227
,
R221
,
C232
,
R231
,)
NO
Check
U500
NO
YES
YES
Microphone does not work
END
YES
Check the
assembled status of
microphone.
Is microphone ok?
①
②
①
②