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Flow Chart of Troubleshooting
10-21
F700 CHECK
pin#6
≥
-60dBm
10-2. RF
10-2-1. EGSM Receiver
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel
Check soldered status of
L701, C701, C738, Ant.
UCD700
pin #34 = 2.9V
UCD700 CHECK
pin#6,#7
≥
-65dBm
RFS701, L700, C700
resolder or change
F700, C708, L702, L703
resolder or change
Check the pin A13 of the
UCP101
TCX101
change or resolder
TCX101 CHECK
pin #3 : 26MHz &
Vp-p : 900mV
UCD700
change or resolder
UCP101 CHECK!!
U702
pin#35,#36,#37,#38
Vp-p
≥
100mV
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
UCD700
pin#19 : 13MHz &
Vp-p = 900mV
YES
NO
1
2
3
4
5
6