Wcdma Band5 Tx - Samsung GT-I9300 Service Manual

8-3-28. WCDMA BAND5 TX

U103 PIN14
: About 22 dBm ?
Check the Voltage at
C110 = VBATT ?
Check C115, L112 :
About 22dBm ?
Check component
soldering status OK at
Check L117,L115,
About 22dBm ?
Check the U105 PIN4
About 22dbm and C143 =
VOUT_CHARGER?
Check the Voltage at C114,
L132 = VOUT_CHARGER?
Check C136
About 0dBm ?
Check the voltage at
{C148= VOUT_CHARGER ?}
& {C158,C159, C160
= VOUT_CHARGER?}
& {C147, C172 = 2.85V ?}
& {C144, C170 = 2.65V ?}
& {C146, C174 = 1.8V?}
& {C173, C171, C145 = 1.2V?}
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NO
YES
NO
YES
NO
YES
NO
F100
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
CHECK soldered
- RFS100, L109, C116, C117,
C191, C101, L103, L102,
ANT103
Resolder or change
U103, C110
Resolder or change
C115, L112
Resolder or change
F100
Resolder or change
L117,L115,
Resolder or change
U105, C143
Resolder or change
C114, L132
Resolder or change
C130
NO
Resolder or change
U108
8-87
Level 3 Repair
CONTINUOUS TX ON CONDITION
TX POWER DAC: 23000 CODE
APPLIED
WCDMA Band5 CH : 4408
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB