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Flow Chart of Troubleshooting
9-10
9-6. Speaker Part(Melody)
)
U601 pin G8 and pin H1
= 2.7V?
Speaker does not work
Check the Clock signal at
Pin G5 of U601
(19.2MHz)
Check the clock generation circuit
(related to U601 and U602)
END
No
Yes
No
Resolder or replace U601
U708 pin C6, B6 ≒
1.8V?
(When UCP300 operate)
Resolder UCP300
Yes
No
Check the signals of
speaker input
Check the circuit related to
melody signal
Yes
No signal
Is Speaker working?
No
OK
Change the Speaker
Yes
Yes
Summary of Contents for SGH-Z400
Page 32: ...8 PCB Diagrams 8 1 Top ...
Page 33: ...PCB Diagrams 8 2 Bottom ...