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5-6 Speaker Part
Speaker does not work
Yes
No
U400 pin 2, 3 = short Resolder U400
Yes
No
U400 pin 2, 3, 6 = 1.25 V ? Replace the PBA
Yes
No
Check the tension of the Speaker Modify the SPK pins
Yes
No
Is Speaker working? Replace the Speaker
Yes
END
Flow Chart of Troubleshooting and Circuit Diagrams
5-11
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