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Flow Chart of Troubleshooting
9-34
9-16. EGSM RX
RX ON
Sector Power = -50dBm
F101 pin11
>=-60dBm
F101 pin23,24
>=-70 dBm
No
Yes
No
Check F101
truth table
No
Yes
Check U101 & UCP201
END
Yes
U101 pin32,33
>=-75 dBm
Yes
1.
Check FEM(F101) input
2.
Check FEM(F101) output
3.
Check RTR6275(U101) input
4.
Check RTR6275(U101) , MSM6260(UCP201)
Resolder or Change
L109,L110,L111
No
②
①
③
④
Pin#6: Low
Pin#5: Low
Pin#4: Low
Resolder RFS101,
C105,L101,R105,L132
Check
R107,R110,
R116,UCP201
Resolder or
Change F101