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Flow Chart of Troubleshooting
10-13
10-1-6. Speaker Part
Speaker does not work
Is the terminal of
Speaker OK?
NO
check the specker connector
SPK400
YES
①
Check the
pin 1,2 of SPK400
"HIGH"
Change or resolder
SPK400
NO
YES
②
Check the circuit
around U410
Change or resolder
around U410
NO
YES
③
Check the voltage of
R450 is high
Check
UCP300
NO
YES
YES
END
Change speaker
NO
Is speaker OK?