Samsung GT-S8500 Service Manual page 62
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Also See for GT-S8500:
- User manual (163 pages) ,
- Quick start manual (60 pages) ,
- User manual (31 pages)
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Level 3 Repair
8- 3 - 20 . WCDMA Band1 TX
F100 pin3:
NO
about 20
dBm?
YES
CN100,C118,L102
check & change
L113
about : 20 dBm
NO
C106,C143 =
3.8~4.2V ?
YES
U101 pin 7 about :
-5dBm ?
NO
C152: about : about
-5dBm
NO
U302
{C314 = 2.2V ?}
& {C316 = 1.3V ?}
& {C360 = 2.3V ?}
& {C321 = 1.4V ?}
YES
Check the freq. at
C300 :19.2MHz ?
YES
Soldering state of U302 is O.K?
YES
END
NO
C120 :
2.85V?
YES
YES
NO
YES
YES
NO
NO
NO
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U302
check & change
F100
change or resolder
Check DC bias
U101
resolder or change
C152,C153,C154,F103
resolder or change
U302
resolder or change
U300
resolder or change
U302
resolder or change
8-33
CONTINOUS TX ON CONDITION
TX POWER DAC:120 CODE APPLIED
CH : 10700
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
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