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