SGH-P730 Flow Chart of Troubleshooting and Circuit Diagrams
2-
14
9. GSM Receiver
Normal condition
catch the
channel ?
Check F601
pin 1
≥
-65 dbm
?
Check U600
pin 20,21
≥
-65dBm ?
Yes
No
No
Check F601
pin 12,13
≥
-65
dbm ?
Yes
No
Yes
Check ANT1, C615
Resolder or change
C629
Resolder or change
F601
Resolder or change
C605, C606, L602
Resolder or change
U501
CONTINOUS RX ON
RF INPUT : 62CH
AMP : -50dbm
Check U600
pin 9, 26 = 2.8V
Yes
Resolder or change
U101 pin 39, C110,R600
Yes
No
No