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9. DCS Receiver
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
U100 Check
Pin #6 ≥ -65dBm ?
YES
U100 Check
Pin #3 ≥ -65dBm ?
YES
U102 Check
Pin #1 ≥ -65dBm ?
YES
U103 Check
Pin#18,19 ≥ -65dBm ?
YES
U103 Check
Pin#9,32=Clean 2.8V?
YES
U103 Check
Pin#28,1,2,3=100mV?
YES
Check U200
SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
NO
NO
NO
NO
NO
NO
NO
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
YES
U103
Change or resolder
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Check soldered status of
C102
CON101
Resolder or Change
U100 Resolder or Change
Check soldered status of
C114, 116
Check soldered status of
C107, 115, ,L102, U102
U300, C306, C308
Check or resolder
NO
OSC100 Check
Pin #8 : 13MHz ?
Vpp : 950mV?
YES
R129, 114
resolder
2-9
NO
OSC100 Check
Pin #4 = 2.8V ?
YES
OSC100
Change or resolder
NO
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