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F low Chart of Troubleshooting
6. Speaker Part
There is no sound fromSpeaker
Is the term inal of Speaker
A re there any signals
Y es
The pin#4 of
U 501 is
" L ow"
N o
C heck U 502
O .K .?
Y es
The type of sound
fromthe Speaker is
M elody
Y es
at the pin#5 and
pin#7 of U 501?
N o
Y es
C heck U 501
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N o
N o
A re there any signals
at the pin#2 and
pin#10 of U 501?
N o
Y es
E N D
7- 8
R eplace the Speaker
Y es
The pin#4 of
U 501 is
" H igh"
N o
C heck U 101
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