Dcs Receiver - Samsung SGH-P520 Service Manual

Flow Chart of Troubleshooting

10-2-2. DCS Receiver

CONTINUOS RX ON
RF INPUT : 698CH
Cell power : -50dBm
NORMAL CONDITION
c atch the channel?
YES
U100 CHECK
pin12 ≥ -65dBm?
YES
U100 CHECK
pin19 ≥ -65dBm?
YES
U101 CHECK
pin22,23 ≥ -65dBm?
YES
the power source
of U101
YES
U101 CHECK
Pin34,35 :26MHz
YES
GSM Receiver is ok?
END
10-26
NO CHECK
L106, C123, C124
NO
RFS100
resolder or change
NO U100
resolder or change
F101,C122,
NO
C123, C124,L106
resolder or change
NO
check UCP300
NO
check OSC100 and
change
NO
GSM RX path component
resolder or change
1
2
3
4
5
6