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9-7. Earphone Part
Receiver does not work
C523, C52 ≥ 100mV ?
(When MP3 file is played)
U502 Pin 9, 16 ≥ 100mV ?
(When MP3 file is played)
Check the circuit
from IFC600 pin 5, 6, 7
to U502
IFC600 pin 5, 7 short?
Is Earphone working?
Yes
Yes
Yes
OK
Yes
Yes
END
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No
Check UCP300
No
Resolder U502
Not OK
Resolder L603, L604, L605, R600, R602
No
Resolder IFC600
No
Replace the Earphone
9-13
Flow Chart of Troubleshooting
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