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Flow Chart of Troubleshooting
10-
17
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UCD102
check & change
BATTERY
check & change
UCD102
check
UCD102
check
U601
check & change
U602
check
OSC601
change or resolder
10-2-4. EGSM TX
U601 pin #12
= about
32~33 dBm
C604, L603, L604, RFS601
check&change
U601
pin #6, #9
= 2.9V
The voltage of
C626
≥
3.7v
NO
NO
YES
YES
NO
U601
pin #8 = 1.2V
YES
NO
YES
U601
pin #11 = about
4~5dBm
NO
NO
U602
pin#12, 13 =
2.9V
U602
pin#30 : 26MHz
&
Vp-p : 900mV?
U602
pin#4,#5,#6,#7
= 1.5V
UCD102
change or resolder
U602
change or resolder
YES
NO
CONTINOUS TX ON CONDITION
TX POWER DAC: 500 CODE APPLIED
CH : 30
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U601
pin #4 : Low
pin #5 : Low
NO
NO
1
6
2
5
2
4
2
2
3
2
YES
YES
YES
YES