Samsung Wave GT-S8500, Service Manual, Page: 62 / 68

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Level 3 Repair
8-33
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8-
3
-
20
. WCDMA Band1 TX
F100 pin3:
about 20
dBm?
CN100,C118,L102
check & change
C120 :
2.85V?
U302
check & change
L113
about : 20 dBm
NO
NO
YES
YES
YES
C106,C143 =
3.8~4.2V ?
NO
U101 pin 7 about :
-5dBm ?
C152: about : about
-5dBm
CONTINOUS TX ON CONDITION
TX POWER DAC:120 CODE APPLIED
CH : 10700
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
YES
YES
Check the freq. at
C300 :19.2MHz ?
YES
Soldering state of U302 is O.K?
U302
resolder or change
END
U302
{C314 = 2.2V ?}
& {C316 = 1.3V ?}
& {C360 = 2.3V ?}
& {C321 = 1.4V ?}
YES
YES
NO
YES
NO
NO
NO
NO
U300
resolder or change
U302
resolder or change
C152,C153,C154,F103
resolder or change
U101
resolder or change
Check DC bias
F100
change or resolder
NO