SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-17
9-2-2. GSM900 Receiver
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continuous RX ON
RF Input : 60 CH
AMP : -50dBm
Replace PAM101
NORMAL CONDITION
Catch the channel ?
YES
NO
Check F101 #17pin
≥
-
55dBm ?
PAM100 Check
Pin #13
≥
-55dBm ?
U102 Check
Pin#17, 18
≥
-60dBm ?
Check antenna contact
Resolder C120
PAM100 Resolder or Change
THE END
NO
NO
YES
YES
YES
Resolder
C124, C125, L107 or
Change U102
NO