Dcs Receiver - Samsung SGH-E600 Service Manual

2. DCS Receiver

CONTINUOS RX ON
RF INPUT : 698CH
Cell power : -50dBm
NORMAL CONDITION
catch the channel?
F1000 CHECK
pin15 ≥ -65dBm?
F1000 CHECK
pin3,4 ≥ -65dBm?
U901 CHECK
pin18,19 ≥ -65dBm?
U901 CHECK
pin9,32 : 2.8V
U901 CHECK
pin8: 13MHz
U901 CHECK
pin 1,2,3,,27:
V p-p100mV
d Receiver is ok?
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SGH-E600/E608 Flow Chart of Troubleshooting and Circuit Diagrams
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
END
CHECK
R1007,,L1000,c1000,contact?
CN1000
resolder or change
F1000
resolder or change
C1004,C1005,L1002
resolder or change
U100 PIN 39, C112
resolder or change
NO
R800, C902
resolder
U901
resolder or change
GSM RX path component
resolder or change
2-11
OSC800 CHECK
pin 4 : 2.8V
pin 3 : 13MHz
V p-p : 950mV
NO
OSC800
change