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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
10-
22
10-2.RF
10-2-1. EGSM RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
DUF100 Check
Pin #6
≥
-65dBm ?
DUF100 Check
Pin #15
≥
-65dBm ?
U106 Check
Pin#42
≥
-65dBm ?
Check soldered status of
C152(5.6pF),R100(NC),L104(NC)
RFS100, C100, L103
Resolder or Change
DUF100 Resolder or Change
U106 Check
Pin#15,16,23,27,31
= 2.9V?
U106 Check
Pin#28,29,30,54=100mV?
C104,C105,C106,C110,
C113,C116,UCD300
Check or resolder
Check UCD300
NO
NO
YES
YES
YES
NO
YES
U106 Check
Pin #17 : 13MHz ?
Vpp : 1.1V?
R113 = 13MHz ?
Vpp = 1.2V?
R110 = 1.5V ?
U106
Change or resolder
NO
NO
NO
C136, R113
resolder
TCX101
Change or resolder
YES
YES
YES
NO
Check soldered status of
L108
YES
NO