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Flow Chart of Troubleshooting
10-24
10-2-4. GSM Transmitter
CONTINOUS TX ON CONDITION
TX POWER DAC: 500 CODE
APPLIED
CH : 30
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
F700 pin #6
≒
2 ~ 3dBm
UCP101
check & change
UCD700
check & change
C700, L700, RFS701
check & change
F700
pin#4
≒
2.9V
NO
YES
YES
YES
1
The voltage of C704
≥
3.7v
UCD700
pin#2
≒
2.9V
YES
NO
BATTERY
check & change
PAM700
pin#1
≒
2.9V
pin#3
≒
0V
PAM700
pin#6
≒
1.2V
Check UCP101
NO
F700 pin #3
≒
2~3dBm
F700
change or resolder
Check UCP101
2
3
4
NO
5
6
2
2
NO
YES
YES
YES
NO
NO
PAM700
change or resolder