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Flow Chart of Troubleshooting
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9-10
9-1-6. Speaker Part
Speaker does not work
Check the LCD module
connection
YES
Check the
TP408 of U409 = "LOW"
Change or resolder
MCP200
NO
YES
Check the circuit
around U409
Change or resolder
R436,R442,U409
NO
YES
Check the R536,R538
Change or resolder
R536,R538
NO
YES
YES
END
Change LCD module
NO
Is speaker OK?