Earphone Part - Samsung SGH-C160L Service Manual

Flow Chart of Troubleshooting

9-6. Earphone Part

(When UCP101 operate)
Earphone does not work
Yes
Check the circuit
EAR 300
OK
Check the R344, R346,
R347, U301 5 pin =2.8V
OK
Check the circuit
R302, R303,
U502,L304,L304
OK
Is JACK_INT signal
LOW?
Yes
END
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Not OK
Resolder IFC300 pin 4,5
Not OK
Resolder R344, R346, R347, U301
Not OK
Resolder R302, R303, L304,L304
Check pin 15, 3 of U505
or not change UCP 200
9-12
and L304, L305
No
No
Check C217, C218
Resolder R348