User Guide

SGH-E620 Flow Chart of Troubleshooting
2-19
2-9. GSM Receiver
Normal condition
catch the
channel ?
Check F700
pin 13
≥
-65 dbm ?
Check U700
pin 20,21
≥
-65dBm ?
Yes
No
No
Check F700
pin 1,2
≥
-65
dbm ?
Yes
No
Yes
Check ANT, C716
Resolder or change
C716, R706
Resolder or change
F700
Resolder or change
C724, C725, L701
Resolder or change
U200
CONTINOUS RX ON
RF INPUT : 62CH
AMP : -50dbm
Check U700
pin 32 = 2.8V
Yes
Resolder or change
U100
Yes
No
No
1
2
3
4
5