Wcdma Band1 Tx - Samsung GT-P1000 Servise Manual

8-3-19. WCDMA BAND1 TX

Check PAM100 PIN1 :
About 22 dBm ?
Check the Voltage a
C136= VOUT_CHARGER?
C136 = VOUT_CHARGER?
Check C168,C144,L114 :
About 22dBm ?
Check C139
about 3.4 V ?
Check PAM103 pin 7
about 22dBm ?
Check C148
about 8dBm ?
Check the voltage at
{R100 = VOUT_CHARGER ?}
& {C110, C343 = 2.85V ?}
& {C111,C112,C337 = 1.8V?}
& {C102,C342 = 2.85V ?}
Check the freq. at C128
: 26MHz ?
WCDMA 2100 Transmitter is O.K?
END
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
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CHECK soldered
RFS100,L105,C117,C119,
C187,C120,L116,C165,ANT101
Resolder or change
PAM100, C136
Resolder or change
C168,C144,L114
Resolder or change
U102
Resolder or change
PAM103
Resolder or change
U101
Change U302
Change or resolder
OSC100
Change U302
8-39
Level 3 Repair
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
GSM850 CH : 190
GSM900 CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB