Samsung SGH-E330 Service Manual page 30

F low Chart of Troubleshooting
6. Speaker Part(Melody)
Speaker does not work
Y es
U 300 pin 5 = 2.85V ?
Y es
C heck the C lock signal at
Pin 1 of U 301 (13M H z)
Y es
U 301 pin 17,18 ¡Ö1.8V ?
(W hen U 301 operate)
Y es
H D C 700 pin 40,42
¡Ö1.8V ?
Y es
Is Speaker working?
Y es
E N D
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N o
R esolder or replace U 300
N o
C heck the clock generation circuit
(related to O SC 100 and U 301)
N o
N o
C heck the circuit related to
N o
7- 10
R esolder U 301
" SPK _P/SPK _N "signal
C hange the Speaker