Table of Contents
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5-10 Melody Part
Melody is not working
U301 Pin 7
U301 Pin 1
Pin 14 is working
spk + / spk -
Change the speaker
5-17
Yes
is H ?
Yes
Check
Working?
Yes
U301
?
Well
Yes
working
Yes
Yes
END
Check the circuit containing U104
Check the R511
Check the C311, C315, C314
R316, R317, R318
Change the U301
Flow Chart of Troubleshooting and Circuit Diagrams
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