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