Wcdma Band2 Tx - Samsung GT-N8000 Servise Manual

Level 3 Repair

8-3-23. WCDMA BAND2 TX

U106 PIN14 : About 20.5
dBm ?
Check the Voltage at
C142 = VOUT_CHARGER?
Check C133, L113
About 20.5dBm ?
Check component
soldering status OK at
F100
Check C160,L121,C161:
About 22dBm ?
Check the Voltage at
C153 = OUT_CHARGER?
Check C196, L134 :
About 0dBm ?
Check the voltage at
{C169 = VBAT_RF ?}
& {C168 = 2.85V ?}
& {C164 = 2.65V ?}
& {C170 = 1.8V?}
& {C171 = 1.2V?}
Check the freq. at C158
: 26MHz ?
WCDMA BAND2
Transmitter is O.K?
END
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YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
YES
NO
YES
NO
CHECK soldered
RFS100,C139,L101,C138,L112
C137,L111,C141,C2107,ANT103
Resolder or change
U106, C142
Resolder or change
C133, L113
Resolder or change
F100
Resolder or change
C160,L121,C161
Resolder or change
U108,C150,C153,C154
Resolder or change
C196, L134
Resolder or change
U101,C164,C168,C169,C170,C171
Change or resolder
OSC100
Resolder or change
UCP300
8-52
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