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Flow Chart of Troubleshooting
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10-11
10-6. Earphone Part
END
Yes
Earphone does not work
Yes
Not OK
Solder pin 5,6,7 of IFC500
, L500, L501 again
Check the circuit
of IFC500
OK
Check the voltages of
R503 are 2.9V
Not OK
Solder R503 again
OK
Not OK
Check the circuit
R401, R402 and U401
Solder R401 and R402 again
OK
No
Check U200 or Change U200
Is JACK_INT signal LOW?
(When U200 operates)
Solder Jack_IN again
Check EAR SW
Solder R502 again
Not OK
No
Ok