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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
10-11
This Document can not be used without Samsung's authorization
10-1-5. Microphone Part
Microphone does not work
Yes
No
Change Microphone or
Check Mic path soldering or
Download Image
Is there signal on the
C434,C437 during input signal
playing
If E/P = ON
END
Check the
Pin 1 of U408 is Low
Check the
Pin 29,23 of UCD401=
some signal on
Yes
Check UCD401 or Resolder
No
No
Check U408 or Resolder
Yes
If E/P = OFF
END
Check the
Pin 1 of U408 is High
Check the
Pin 23,30 of UCD401=
some signal on
Yes
Chech UCD401 or Resolder
No
No
Check U408 or Resolder
Yes