Samsung GT-S8500 Service Manual page 54

Level 3 Repair
8-3-15. DCS/PCS RX
NORMAL CONDITION
catch the channel?
Check C118 ≤ -65dBm ?
Check the Voltage at
C120 = 2.85V ?
check both pad of C129
≥ -65dBm ?
Check component
soldering status OK at
C127, C130, L108 ?
U302
{C314 = 2.2V ?}
& {C319 = 1.3V ?}
& {C360 = 2.3V ?}
& {C321 = 1.4V ?}
Check the freq. at C300
:19.2MHz ?
DCS/PCS Receiver is O.K?
END
NO
YES
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NO
YES
NO
YES
NO
YES
NO
YES
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YES
NO
YES
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CHECK soldered
CN100, C118, L102
U302, C341, C120
resolder or change
F100
resolder or change
C127, C130, L108
resolder or change
U302
resolder or change
U300
change or resolder
U302
resolder or change
8-25
CONTINUOUS RX ON
DCS RF INPUT : 698CH
PCS RF INPUT : 661CH
AMP : -50dBm