Samsung GT-P5100 Service Manual page 59

Level 3 Repair
8-3-16. GSM1800 RX
NORMAL CONDITION
catch the channel?
Check C121 ≤ -65dBm ?
Check the Voltage at
C103 =VOUT_CHARGER
Check C119
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 18, 19
≥ -65dBm
Check the voltage at
{C150 = VBAT_RF ?}
& {C149 = 2.85V ?}
& {C145 = 2.65V ?}
& {C151 = 1.8V?}
& {C152 = 1.2V?}
Check the freq. at C139
: 26MHz ?
GSM 1800
Receiver is O.K?
END
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NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
CHECK soldered
L108,C121, RFS100
Resolder or change
U101, C103
Resolder or change
Check C119
Resolder or change
F100
Resolder or change
F100
Resolder or change
U104
Change or resolder
OSC100
Resolder or change
UCP300
8-40
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm