Samsung GT-i9003 Service Manual page 64

8-3-18. GSM850/GSM900 TX
PAM101 PIN1 : About
30dBm ?
Check the Voltage at
C186,C187,C139 =
V_BAT?
Check C132 about 2 V
Check PAM101 pin 25
about 4dBm
Check the voltage at
{R100 = V_BAT ?}
& {C110, C264 = 2.85V ?}
& {C111,C112,C233 = 1.8V?}
& {C109,C263 = 2.85V ?}
& {C112 = 1.8GV ?}
Check the freq. at C128
: 26MHz ?
GSM850/900 Transmitter is O.K?
END
NO
YES
NO
YES
NO
ok?
YES
NO
YES
NO
YES
YES NO
YES
NO
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CHECK soldered
RFS100, L103,C115,L118,
C183, ANT102
resolder or change
PAM101, C186, C187, C189
resolder or change
U101
resolder or change
U101
resolder or change
UCP200
change or resolder
OSC100
resolder or change
UCP200
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