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Flow Chart of Troubleshooting
9-14
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RFS100 CHECK
Pin#2
≥
-65dBm ?
9-2-2. DCS1800 RX
*Refer to the
Line(DCS1800 Rx path) in service schematic page1
CHECK
ANT,C151,C100,C101,C102
contact ?
NORMAL CONDITION
catch the channel?
NO
YES
RFS100
resolder or change
NO
YES
C103,C104,PAM100
resolder or change
NO
PAM100 CHECK
Pin#
17
≥
-65dBm ?
YES
NO
F10
1
CHECK
Pin#
1
≥
-65dBm ?
C111,F101
resolder or change
YES
NO
C110,C112,L101
resolder or change
U100 CHECK
Pin#
15
,
16
≥
-65dBm ?
YES
OSC100
resolder or change
OSC100 CHECK
Pin#1, #3 : 26MHz
NO
C127,C128,C129 2.8V ?
R105, C136 2.9V?
YES
C127,C128,C129,R105,C136
resolder or change
NO
YES
DCS1800 Receiver is OK?
NO
DCS1800 RX path components
resolder or change
END
(C103)
(C111)
(Insert Conduction RF cable)
(C110,C112)
(*Pad #1,3 is visible)
Continuous Rx on, Rx input=-60dBm, Channel=
698
