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Level 3 Repair
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Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-87
U103 PIN14
: About 22 dBm ?
8-3-28. WCDMA BAND5 TX
Check the Voltage at
C110 = VBATT ?
Resolder or change
U103, C110
Check C115, L112 :
About 22dBm ?
Resolder or change
C115, L112
NO
YES
NO
YES
NO
CHECK soldered
-
RFS100, L109, C116, C117,
C191, C101, L103, L102,
ANT103
YES
Check component
soldering status OK at
F100
Resolder or change
F100
NO
YES
Check L117,L115,
About 22dBm ?
Resolder or change
L117,L115,
NO
YES
Check the Voltage at C114,
L132 = VOUT_CHARGER?
Resolder or change
C114, L132
NO
YES
Check C136
About 0dBm ?
Resolder or change
C130
YES
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?}
Resolder or change
U108
NO
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
YES
Check the U105 PIN4
About 22dbm and C143 =
VOUT_CHARGER?
Resolder or change
U105, C143
YES
NO
NO