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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-27
9-13. GSM Receiver
RX ON
RF input : 62CH
Amp : -50dBm
Yes
MOD100 pin8
>= -65dBm
No
Resolder CNS100, C102
Yes
MOD100 pin1, 2
>= -65dBm
Check MOD100
pin10, 12 = L
No
No
Check ANT Switch
control circuit
Yes
Resolder MOD100
Yes
U101 pin27, 28
>= -70dBm
No
Resolder L113, L114, L115
Yes
No
No
Check or resolder
TCX100(26MHz),
RF PSU Part
Check U101 pin
5, 15, 17, 20, 31, 38
>=2.7V
U101 pin1, 2, 3, 4
>= 1V
Yes
Yes
Resolder U101
Check UCP200
END
Summary of Contents for SGH-E740S
Page 35: ...8 PCB Diagrams 8 1 Top ...
Page 36: ...PCB Diagrams 8 2 Bottom ...