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SAMSUNG Proprietary-Contents may change without notice
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Flow Chart of Troubleshooting
9-24
9-13. GSM900 Transmitter
F101 Pin8
>= 20dBm
Resolder RFS100,C101,L141
TX ON (5Level)
Check F101
pin10 =
H (2.68V)
pin12 = L
F101 pin11
>= 18dBm
PAM100 pin10
>= 18dBm
U102 pin38
<= -15dBm
PAM100 pin9
<= -11dBm
Check ANT Switch
control circuit
Change or Resolder F101
Resolder
C131,L111,C141
Yes
Check PAM100
pin 3,4,5,6,7 OK?
Resolder or Change PAM100
Check +VBAT or PAM
control signal
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
U102 pin 6,7,8,9
>= 1V
Check & Resolder RFLO
signal, RF26MHz,
RF PSU Part
No
Yes
Yes
END
Check UCP200
Resolder U102
No
Check U102
pin23, 26, 31
>=2.7V
Resolder C130,C133,L114,
C134,C132,L112
Summary of Contents for SGH-E380
Page 32: ...8 PCB Diagrams 8 1 Top ...
Page 33: ...PCB Diagrams 8 2 Bottom ...