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 FPCB
YES
①
Check the
SPK_A&SPK_G
"HIGH"
Resolder
SPK_A & SPK_G
NO
YES
②
Check the circuit
around U407
Change or resolder
around U407
NO
YES
③
Check the voltage of
R440, R442 is high
Check
UCP300
NO
YES
YES
END
Change speaker
NO
Is speaker OK?