Samsung GT-P3100, Servise Manual

Page: 64 / 78

Level 3 Repair
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Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-57
U101 PIN18 : About
22dBm ?
8-3-24. WCDMA BAND2 TX
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band2 CH : 9880
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
Check the Voltage at
C103 = V_BAT ?
Resolder or change
U101, C103
Check L102, L105 :
About 22dBm ?
Resolder or change
L102, L105
YES
NO
NO
YES
YES
CHECK soldered
- CN100, C119, C112,
C118,L106,C120,C113,ANT101
NO
Check component
soldering status OK at
F100
Resolder or change
F100
NO
YES
Check
L119, C144, C155
About 22dBm ?
Resolder or change
L119, C144, C155
YES
NO
Check the Voltage at
C157 = V_BAT ?
Resolder or change
U102, C157
NO
YES
Check C151
About 0dBm ?
Resolder or change
C151, C153
YES
YES
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?}
Resolder or change
U104
NO
YES
Check the Voltage at
C138 = V_BAT ?
Resolder or change
U103, C138
NO
YES