Dcs/Pcs Tx - Samsung GT-i9100 Service Manual

8-3-18. DCS/PCS TX

U101 PIN11 : About
27dBm ?
Check the Voltage at
C102 = VOUT_CHARGER?
Check C111, C118 :
About 27dBm ?
Check the Voltage at
R741,C117=VOUT_CHARGER?
Check C124, L111 :
About -4dBm ?
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 ?
DCS/PCS Transmitter is O.K?
END
YES
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
YES
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YES
NO
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CHECK soldered
- RFS100,L107,C107,L108,
C106,C104,C105,ANT100
Resolder or change
U101, C102
Resolder or change
C111, ,C118
Resolder or change
PAM100, R741, C117
Resolder or change
C124, L111
Resolder or change
U104
Change or resolder
OSC100
Resolder or change
UCP300
8-49
Level 3 Repair
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
DCS CH : 685
PCS CH : 661
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB