SGH-E910 Flow Chart of Troubleshooting
2-
13
2-1-6. Speaker Part
Speaker does not work
Check the speaker
Or con-to-con FPCB
OK?
NO
Speaker resolder or speaker change
con-to-con FPCB change
YES
①
Check the pin1 of U406
is LOW?
U406 Check and
change
NO
YES
②
Check the pin4,pin8
of U402 is high?
U402 Resolder or change
R408, R409 Resolder or
change
NO
YES
③
Is there sinewave signal
on the U403 pin17,18
during melody playing?
Hardware reset or
U403 change
NO
YES
④
Check the Pin #1
of U402 = "3.8V"
Check
R438
NO
YES
YES
END
Change speaker
NO
Is speaker OK?
