Wcdma Band1 Rx - Samsung GT-P3100 Servise Manual

Level 3 Repair

8-3-17. WCDMA Band1 RX

NORMAL CONDITION
catch the channel?
Check C116 ≤ -65dBm ?
Check the Voltage at
C103 = V_BAT?
Check C126, L110, L113
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 14, 15
≥ -65dBm
Check the voltage at
{C150= VBAT_RF ?}
& {C158, C159 C160 =
V_BAT?}
& {C149, C170 = 2.85V ?}
& {C145, C165 = 2.65V ?}
& {C148, C172 = 1.8V?}
& {C166, C171, C147) = 1.2V?}
Check the freq. at C137
: 26MHz ?
WCDMA B1 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
CN100, C116, L108, C119
Resolder or change
U101, C103
Resolder or change
C126, L110, L113
Resolder or change
F100
Resolder or change
F100
Resolder or change
U104
Change or resolder
OSC100
Resolder or change
UCP300
8-42
CONTINUOUS RX ON
RF INPUT : 10700CH
AMP : -50dBm