
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-29
9-20. PCS Transmitter
Check U102 pin5,
15, 17, 20, 31, 38
>=2.8V
Resolder U102
Check UCP200
END
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Check & Resolder RFLO
signal, RF26MHz,
RF PSU Part
Check +VBAT or PAM
control signal
Resolder or Change MOD100
Check U103
pin 2,3,4,5,6 OK?
Yes
U102 pin 1,2,3,4
>= 1V
Resolder R102
Resolder C107, L110
Change or Resolder
MOD100
Check ANT Switch
control circuit
U103 pin1
<= -11dBm
U102
pin37
<= -15dBm
U103 pin10
>= 18dBm
MOD100 pin12
>= 18dBm
Check MOD100
pin 14 = L
pin 13 = H
TX ON (0Level)
Resolder RFS100,C100,L102
MOD100 Pin10
>= 20dBm
No
No
No
No
No
No
Содержание SGH-D900
Страница 28: ...8 PCB Diagrams 8 1 8 1 Main PCB Diagram Top ...
Страница 29: ...PCB Diagrams 8 2 Bottom ...