Samsung SGH-E330N Service Manual page 38

Flow Chart of Troubleshooting
7-6. Speaker Part(Melody)
Speaker does not work
Y e s
U300 pin 5 = 2.85V?
Y e s
Check the Clock signal
at Pin 1 of U301
(13MHz)
Y e s
U301 pin 17 , 1 8 ¡ Ö 1.8V ?
(When U301 operate)
Y e s
HDC700 pin 40, 4 2
¡ Ö 1.8V?
Y e s
Is Speaker working ?
Y e s
END
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No
Resolder or replace U300
No
Check the clock generation circuit
(related to OSC100 and U301)
No
No
Check the circuit related to
" S PK_ P /SPK_ N " signal
No
7- 12
Resolder U301
Change the Speaker