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SGH-S400i Flow Chart of Troubleshooting
2-
25
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2-1-8. Receiver Part
Speaker does not work
Is speaker working ?
No
Are there any signal at
the C125, C175 ?
Pin#6 of SLC101 = High ?
Replace the speaker
Check the UCP307
END
No
No
Yes
Yes
Are there any signal at the
R118, R119 ?
Change the FPCB
Check the SLC103
No
Are there any signal at the
Pin #3,4 of PAM127?
No
Yes
Yes
Yes
Are there any signal at the
C145, C146 ?
Check the U110 and related
parts
No
Are there any signal at the
pin #5, 7 of U126 ?
Change the FPCB
Check the SLC103
No
Yes
Check the U126
YES
Are there any signal at the
Pin #2, 10 of U110?
Check the PAM127
Check the C131, C133, R104,
R105