Pcs Receiver - Samsung SGH-P520 Service Manual

10-2-3. PCS Receiver

CONTINUOS RX ON
RF INPUT : 650CH
Cell power : -50dBm
NORMAL CONDITION
c atch the channel?
YES
U100 CHECK
pin12 ≥ -65dBm?
YES
U100 CHECK
pin21 ≥ -65dBm?
YES
U101 CHECK
pin20,21 ≥ -65dBm?
YES
the power source
of U101
YES
U101 CHECK
Pin34,35 :26MHz
YES
GSM Receiver is ok?
END
10-27
NO CHECK
C129, L107, L108
NO
RFS100
resolder or change
NO U100
resolder or change
F102,C128
NO
C129, L107, L108
resolder or change
NO
check UCP300
NO
check OSC100 and
change
NO
GSM RX path component
resolder or change
Flow Chart of Troubleshooting
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