Level 3 Repair
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U101 PIN14 : About
30dBm ?
8-3-22. DCS/PCS TX
DCS / PCS Transmitter is O.K?
Resolder or change
UCP300
END
YES
NO
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
GSM850 CH : 190
GSM900 CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
Check the Voltage at
C103 = V_BAT?
Check the Voltage at
C138 =V_BAT ?
CHECK soldered
-
CN100, C119, C112,
C118,L106,C120,C113,ANT101
Resolder or change
U101, C103
Resolder or change
U103, C138
Check C128,L115, C132,
: About 30dBm ?
Resolder or change
C128,L115, C132
YES
NO
NO
YES
YES
NO
NO
YES
Check C146: About
0dBm ?
Resolder or change
C146, C152
YES
YES
Check the voltage at
{C150= VBAT_RF ?}
& {C158, C159 C160 =
V_BAT?}
& {C149, C170 = 2.85V ?}
& {C145, C165 = 2.65V ?}
& {C148, C172 = 1.8V?}
& {C166, C171, C147) = 1.2V?}
Resolder or change
U104
Check the freq. at C137
: 26MHz ?
Change or resolder
OSC100
NO
YES
NO
Содержание GT-P3100
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