Samsung SGH-S108 Service Manual page 24

6. Speake r
Ther e is no sound from Speaker
Is the terminal of Speaker
Ar e there any signals
Is ther e any signals
Yes
The pin#4 of
U400 is
No
Check U400
O.K.?
Yes
at the C221,C228?
Yes
The type of sound
fr om the Speaker is
Yes
at the pin#5 and
pin#7 of U400?
No
Yes
Check U401
SAMSUNG Proprietary-Contents may change without notice
SGH- S108 E xploded view and its Part list
No
No
Check LCD or Replace CN201
Melody
Is there any signals
at the pin#2 and
pin#10 of U400?
No
Yes
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Replace the Speaker
No
Yes
The pin#4 of
U400 is
"High"
No
Check U700