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Level 3 Repair
8-52
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Check L103 > 30 dBm ?
8-3-19. GSM850/GSM900 TX
Check the Voltage
C100,C101,C102,C103
=VBAT?
Check the Power
F100 Pin 7 > 30dBm ?
CHECK soldered
RFS100, L103,L104,C112,C113
resolder or change
F100
resolder or change
C100,C101,C102,C103
Check the freq. at
OSC500 : 19.2MHz ?
change or resolder
OSC500
Check C107
≥
30dBm ?
resolder or change
C107,C109,PAM100
GSM850/900 Transmitter is O.K?
resolder or change
U300
END
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
GSM850 CH : 190
GSM900 CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
NORMAL CONDITION
NO