Wcdma Band5 Tx - Samsung GT-i9100 Service Manual

8-3-21. WCDMA BAND5 TX

Check U101 PIN11 :
About 22 dBm ?
Check the Voltage at
C102 = VOUT_CHARGER?
Check C100, L100 :
About 22dBm ?
Check component
soldering status OK at
F100
Check C128, C133
About 22dBm ?
Check the Voltage at
R741,C117=VOUT_CHARGER?
Check C125, L112 :
About 0dBm ?
Check the voltage at
{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}
& {C135, C175, C173 = 1.2V?}
Check the freq. at C123
: 26MHz ?
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
YES
NO
YES
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CHECK soldered
- RFS100,L107,C107,L108,
C106,C104,C105,ANT100
Resolder or change
U101, C102
Resolder or change
C100, L100
Resolder or change
F100
Resolder or change
C128, C133
Resolder or change
PAM100, R741, C117
Resolder or change
C125, L112
Resolder or change
U104
Change or resolder
OSC100
8-57
Level 3 Repair
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band5 CH : 4408
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB