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Flow Chart of Troubleshooting
10-2.RF
10-2-1. EGSM RX
NORMAL CONDITION
catch the channel
pin#12 ≥ -65dBm
pin#21,#22 ≥ -65dBm
pin #12, #13 = 2.9V
pin #1 : 26MHz &
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YES
U601 CHECK
YES
U601 CHECK
pin#16 ≥ -65dBm
YES
U602 CHECK
YES
U602
YES
OSC601 CHECK
Vp-p : 900mV
YES
U602
pin#1,#2,#3,#28
Vp-p = 100mV
YES
UCD102 CHECK!!
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NO
Check soldered status of
L611, C633, Ant.
NO
RFS601, L604, L603, C604
resolder or change
NO
U601
resolder or change
NO
C701, C702, C703, F701
resolder or change
NO
Check the VRF_2.9
of the UCD102
NO
OSC601
change or resolder
NO
U602
resolder or change
10-13
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
1
2
3
4
5
6
7
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