Microphone Part; Speaker Part - Samsung SGH-S300 Service Manual

SGH-S300 Flow Chart of Troubleshooting and Circuit Diagrams

5. Microphone Part

Microphone does not work
Check the assembled
status of microphone.
Check the reference
voltage on mic path
C418 =2.5V
Is microphone ok?

6. Speaker Part

Speaker does not work
Check the connection
status spk to CN 200
Check the PIN 1 of
U402 = 'High' ?
Check U700, R201, R202
Is s peaker ok?
END
NO
YES
NO
YES
NO
YES
END
NO
YES
NO
YES
NO
YES
NO
YES
SAMSUNG Proprietary-Contents may change without notice
Reass emblage microphone
C400,R428,R409,R405,R406)
Resolder and check the board
6-4
resolder or change
Check U700
to board connector
Check U601
Change or resolder
U 700, R201, R202
Change Speaker