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Flow Chart of Troubleshooting
9-12
9-6. Speaker Part(Melody)
U512 pin 5 = 2.85V?
Speaker does not work
Check the Clock signal
at
pin1(CLKI) of
U502(13MHz)
Check the clock generation circuit
(related to OSC101 and U502)
END
No
Yes
No
Resolder or replace U512
C514 & C515 Around
U502 ≒ 1.8V?
(When U502 operate)
Resolder U502
Yes
No
is Speaker Contact in
proper position?
Check the speaker Contact
Yes
No
Is Speaker working?
No
Yes
Change the Speaker
Yes
Yes
Summary of Contents for SGH-X656
Page 41: ...8 PCB Diagrams 8 1 ...
Page 42: ...PCB Diagrams 8 2 ...