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SGH-E600/E608 Flow Chart of Troubleshooting and Circuit Diagrams
2-
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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?
CHECK
R1007,,L1000,c1000,contact?
NO
CN1000
resolder or change
NO
F1000
resolder or change
NO
C1004,C1005,L1002
resolder or change
NO
YES
YES
YES
YES
U901 CHECK
pin9,32 : 2.8V
NO
U100 PIN 39, C112
resolder or change
U901 CHECK
pin8: 13MHz
NO
R800, C902
resolder
NO
OSC800 CHECK
pin 4 : 2.8V
pin 3 : 13MHz
V p-p : 950mV
YES
OSC800
change
NO
U901 CHECK
pin 1,2,3,,27:
V p-p100mV
NO
U901
resolder or change
YES
d Receiver is ok?
NO
GSM RX path component
resolder or change
END
YES
