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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-18
9-2.RF
9-2-1. EGSM RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U100 Check
Pin #6
≥
-65dBm ?
U100 Check
Pin #12,13
≥
-65dBm ?
U101 Check
Pin#6, 7
≥
-65dBm ?
RFS100, C100, L101
Resolder or Change
U100 Resolder or Change
U101 Check
Pin#1,13,22,32
≥
3.1V?
U101 Check
R117 : 13MHz
BTC500 PIN 3, C526
Check or resolder
END
YES
YES
YES
U101 Check
Pin 35,36,37,38:
Vp-p 100mV
YES
Check soldered status of
L106, L107, C109
YES
YES
R117
Check or resolder
TCX100 CHECK
pin 4 : 2.9V
PIN 3 : 13MHz
V p-p : 800mV
NO
NO
NO
NO
NO
NO
TCX100
change
NO
GSM Receiver is ok?
YES
U101
Resolder or Change
NO
GSM RX path component
resolder or change
NO
Check soldered status of
C100, C101, L102, C102