Samsung GT-P6800 Servise Manual page 95

Level 3 Repair
8-3-26. WCDMA BAND1 TX
U101 PIN14 : About
22dBm ?
Check the Voltage at
C109 = V_BAT ?
Check L104, C113 :
About 22dBm ?
Check component
soldering status OK at
L108, C123, C124:
About 22dBm ?
Check the Voltage at
C158 = V_BAT ?
Check the Voltage at
C125 = V_BAT ?
Check C144
About 0dBm ?
Check the voltage at
{C152 = VBAT_RF ?}
& {C159,C161 = V_BAT?}
& {C151, C167 = 2.85V ?}
& {C147, C164 = 2.65V ?}
& {C150, C169 = 1.8V?}
& {C149, C165, C168) = 1.2V?}
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YES
NO
NO
YES
YES
NO
NO
F100
YES
YES
Check
NO
NO
YES
NO
YES
YES
YES
YES
CHECK soldered
- RFS100, C111, L105
C104, C102, C105, C103,
ANT100
Resolder or change
U101, C109
Resolder or change
L104, C113
Resolder or change
F100
Resolder or change
L108, C123, C124::
Resolder or change
U102, C158
Resolder or change
U103, C125
Resolder or change
C144
NO
Resolder or change
U104
8-64
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band1 CH : 10700
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB