Wcdma Band1 Tx - Samsung SM-T805 Service Manual

Level 3 Repair

8-3-28. WCDMA Band1 TX

U1002 PIN6 : About
30dBm ?
Check the Voltage at
{C1023 > 3.6V?}
Check L1020 : About
20dBm ?
Check L1004 : About
20dBm ?
Check the Voltage at
C1062, C1059 > 3V?
Check C1086 : About
0dBm ?
Check the voltage at
{C1058, = 1.8V ?}
& {C1055 = 1.2V ?}
& {C1048 = 1.5V ?}
& {C1057 = 2.5V ?}
Check the freq. at
C1099 : 26.0MHz ?
WCDMA B1 Transmitter is O.K?
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YES
NO
NO
YES
YES
NO
NO
NO
NO
YES
NO
YES
YES
NO
YES
NO
END
CHECK soldered
RFS1001, F1001, C1015,
L1011, C1018
Resolder or change
U1002, C1023
Resolder or change
L1020, L1014
Resolder or change
U1001, L1004, L1073, C1006
Resolder or change
PAM1002, C1062, C1066,
C1059, C1065, C1067, C1068,
U1003, C1078, C1095,
C1098, C1101
Resolder or change
C1086, C1087, L1038
NO
Resolder or change
U1007
Change or resolder
OSC1001
Resolder or change
UCP301
8-87
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band1 CH : 9750
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB