SGH-X200 Flow Chart of Troubleshooting
2-11
2-2. RF
2-2-1. GSM Rx
Normal condition
catch the
channel ?
Check U100
pin 12
≥
-65
dbm ?
Check U102
pin 21,22
≥
-
65dBm ?
Yes
No
No
Check U100
pin 16
≥
-65
dbm ?
Yes
No
Yes
Check ANT,
R198,R199,C104,L113
Resolder or change
CN100, C102,L100,L101,L111
Resolder or change
U100
Resolder or change
F101,C105,C109,L104
Resolder or change
U201
CONTINOUS RX ON
RF INPUT : 62CH
AMP : -50dbm
Check U102
pin 13 = 2.9V
Yes
Resolder or change
U107
Yes
No
No
1
2
3
4
5
Содержание SGH SGH X200
Страница 10: ...SGH X200 Flow Chart of Troubleshooting 2 7 1 1 2 ...
Страница 12: ...SGH X200 Flow Chart of Troubleshooting 2 9 1 2 ...
Страница 15: ...SGH X200 Flow Chart of Troubleshooting 2 12 1 2 3 4 5 ...
Страница 17: ...SGH X200 Flow Chart of Troubleshooting 2 14 1 2 3 4 5 ...
Страница 19: ...SGH X200 Flow Chart of Troubleshooting 2 16 1 2 3 4 5 ...