![background image](http://html.mh-extra.com/html/samsung/sgh-u600/sgh-u600_service-manual_1191188028.webp)
Flow Chart of Troubleshooting
3-13
3-1-6. Speaker Part
Speaker does not work
Is the terminal of
Speaker OK?
NO
check the specker connector
HDC500
YES
①
Check the
pin 58,59of HDC500
"HIGH"
Change or resolder
HDC500
NO
YES
②
Check the circuit
around U409
Change or resolder
around U409
NO
YES
③
Check the voltage of
R420, R431 is high
Check
UCP300
NO
YES
YES
END
Change speaker
NO
Is speaker OK?