Samsung GT-i5800 Service Manual page 62
Gsm telephone
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Also See for GT-i5800:
- User manual (138 pages) ,
- Quick start manual (63 pages) ,
- User manual (128 pages)
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8-3-24. WCDMA Band1 TX
F100 pin3:
NO
about 20
dBm?
YES
RFS100, C100,
L101
check & change
L115
about : 20 dBm
NO
C128,C130 =
3.8~4.2V ?
YES
PAM100 pin 7
about : -5dBm ?
NO
C137: about : about
-5dBm
NO
U300
{{C309 = 2.2V ?}
& {C316 = 1.3V ?}
& {C318 = 2.3V ?}
& {C320 = 1.4V ?}
YES
Check the freq. at
C303 :19.2MHz ?
YES
Soldering state of U300 is O.K?
YES
END
NO
C102 :
2.85V?
YES
YES
NO
YES
YES
NO
NO
NO
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U300
check & change
FEM100
change or resolder
Check DC bias
PAM100
resolder or change
C137,C138,L116,F102
resolder or change
U300
resolder or change
OSC301
resolder or change
U300
resolder or change
8-44
Level 3 Repair
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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