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Flow Chart of Troubleshooting
9-26
9-15 EGSM TX
PAM100 pin
17
:
about 2~3 dBm?
RFS100,R109,R110,
L100,L101,C106,C112
check&change
PAM100
pin4 : 2.8 V?
UCD300
check & change
PAM100
pin30 : 3.7 V?
NO
NO
YES
YES
NO
BATTERY ,UCD300
check & change
PAM100
pin 3 : 1.2V ?
YES
NO
PAM100 pin17
about : -5dBm ?
YES
PAM100
pin 4 : 2.8V?
YES
YES
PAM100
change or resolder
NO
UCP200
check
Check R104
NO
RFT100
pin31 : 2.9V ?
UCD300
pinF3,C313,C314
change oresolder
YES
RFT100
pin9,10 : 26MHz ?
Vp-p : 380mV?
YES
UCD300
change or resolder
NO
NO
RFT100
change or resolder
YES
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH :
62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
RFT100
pin1,2,3,4
:100mV?
NO
OSC100
change or resolder