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Flow Chart of Troubleshooting
9-2.RF
9-2-1. EGSM RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
U100 Check
Pin #6 ≥ -65dBm ?
YES
U100 Check
Pin #12,13 ≥ -65dBm ?
YES
UCP100 Check
Pin#10, 11 ≥ -65dBm ?
YES
UCP100 Check
Pin#34 =Clean 2.8V?
YES
UCP100 Check
Pin#35,36,37,38=100mV?
YES
Check U300
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NO
NO
NO
NO
NO
NO
UCP100 Check
Pin #21 : 13MHz ?
Vpp : 1.1V?
YES
UCP100
Change or resolder
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Check soldered status of
L101
RFS101, C102, L103
Resoer or Change
U100 Resolder or Change
Check soldered status of
L104, L105, C107
C104
Check or resolder
NO
R119 = 13MHz ?
Vpp = 1.2V?
YES
C127, C128
resolder
9-20
NO
R117 = 2.8V ?
YES
TCX101
Change or resolder
NO
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