Flow Chart of Troubleshooting
3-14
3-1-6. Speaker Part
Speaker does not work
Is the terminal of
Speaker OK?
O.K.?
NO
check the specker connector
HDC602
YES
①
Check the
pin 58,59of HDC602
"HIGH"
Change or resolder
HDC602
NO
YES
②
Check the circuit
around U402
Change or resolder
around U402
NO
YES
③
Check the voltage of
R419, R420 is high
Check
UCP300
NO
YES
YES
END
Change speaker
NO
Is speaker OK?