Flow Chart of Troubleshooting
9-
12
9-6. Speaker Part(Melody)
U708 pin#7 and pin#32
= 2.7V?
Speaker does not work
Check the Clock signal
at Pin#1 of U708
(13MHz)
Check the clock generation circuit
(related to U600 and U708)
END
No
Yes
No
Resolder or replace U708
U708 pin 10,11 ≒ 1.8V?
(When U401 operate)
Resolder U401
Yes
No
Check the
signals of
speakerinpit
Check the circuit related to
memody signal
Yes
No signal
Is Speaker working?
No
OK
Change the Speaker
Yes
Yes
Summary of Contents for SGH-Z310
Page 37: ...8 PCB Diagrams 8 1 8 1 PCB Top Diagram ...
Page 38: ...PCB Diagrams 8 2 8 2 PCB Bottom Diagram ...
Page 41: ...Flow Chart of Troubleshooting 9 3 ...
Page 45: ...Flow Chart of Troubleshooting 9 7 ...
Page 67: ...Flow Chart of Troubleshooting 9 29 ...