Table of Contents
Advertisement
Flow Chart of Troubleshooting
10-1-6. Speaker Part
Speaker does not work
Is the terminal of
Speaker OK?
YES
Check the
p in 6of U 40 6 = "HIGH"
YES
Check the circuit
around U407
YES
Check the Pin#3, #10
of U404 = "LOW or
HIGH"
YES
Check the Pin #6
of U406 = "3.7V"
YES
Is speaker OK?
YES
END
NO
NO
NO
NO
NO
NO
10-12
Check SPK400 connection
①
Change or resolder
U406
②
Change or resolder
R442,R443,R445,R446
R447,R448
C446,C447,C452,C453
L402,L403,L404
③
Check
U406
④
Check
C431 or L401
Change speaker
Advertisement
Table of Contents
