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SG H- X100 F low Chart of Troubleshooting
6. Speaker Part(Melody)
Speaker does not work
U 300 pin 5 = 2.85V
Y es
C heck the C lock signal at
Pin 1 of U 301 (13M H z)
is O K ?
Y es
U 301 pin 17, 18¡Ö1.8V
Y es
Is Speaker working?
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 101 and U 300)
N o
N o
C heck the Spearke C ontact and
7- 10
R esolder U 301
change the Speaker
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