Dcs Receiver - Samsung SGH-X810 Service Manual

Flow Chart of Troubleshooting

9-2-2. DCS Receiver

CONTINUOS RX ON
RF INPUT : 698CH
Cell power : -50dBm
NORMAL CONDITION
c atch the channel?
F100 CHECK
pin13 ≥ -65dBm?
F100 CHECK
pin3,4 ≥ -65dBm?
U103 CHECK
pin18,19 ≥ -65dBm?
U103 CHECK
pin9,32 : 2.8V
U103 CHECK
R114 :13MHz
U103 CHECK
pin 1,2,3,4,5,6,7:
Vp-p 100mV
DCS Receiver is ok?
END
NO
YES
NO
resolder or change
YES
NO
resolder or change
YES
NO
C107, C108, L103
resolder or change
YES
NO
U300 PIN A13, C314
resolder or change
YES
NO
resolder or change
YES
NO
resolder or change
YES
NO
DCS RX path component
resolder or change
1
CHECK
C102 contact
2
RFS100
3
F100
4
5
6
NO
R114
8
U103
9-20
TCX100 CHECK
pin 4 : 2.8V
pin 3 : 13MHz
V p-p : 800mV
NO
7
TCX100
change