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Level 3 Repair
8-41
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Check PAM100 PIN1 :
About 22 dBm ?
8-3-20. WCDMA BAND2 TX
Check the voltage at
{R100 = VOUT_CHARGER ?}
& {C110, C343 = 2.85V ?}
& {C111,C112,C337 = 1.8V?}
& {C102,C342 = 2.85V ?}
Check the Voltage at
C136= VOUT_CHARGER?
Check PAM102 pin 7
about 22dBm ?
CHECK soldered
RFS100,L105,C117,C119,
C187,C120,L116,C165,ANT101
Resolder or change
PAM100, C136
Resolder or change
PAM102
Change U302
Check the freq. at C128
: 26MHz ?
Change or resolder
OSC100
Check C145,C143,L113 :
About 22dBm ?
Resolder or change
C145,C143,L113
WCDMA 1900 Transmitter is O.K?
Change U302
END
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
YES
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
Check C139
about 3.4 V ?
Resolder or change
U102
NO
YES
Check C147
about 8dBm ?
Resolder or change
U101
NO
YES
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