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Flow Chart of Troubleshooting
7-16
7-11. DCS transmitter
CONTINUOUS TX ON CONDITION
CH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE APPLIED
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U101
change or
resolder
F100 pin#5 :
about 2~3
dBm?
CN100, C105
check&change
F100
pin#10 : 3 V?
U300
check & change
L101:
≒ 4~5dBm?
U101
check & change
C109 : 3.7 V?
NO
NO
YES
YES
YES
NO
NO
BATTERY, U100
check & change
Between
R101 & U101
: 1.2V?
YES
NO
R101
check &
change
NO
R100:
≒ -5dBm ?
YES
YES
YES
U300
check
NO
U100
change or
resolder