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Level 3 Repair
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8-44
Check C1030
≤
-65dBm ?
8-3-12. GSM1800 RX
NORMAL CONDITION
catch the channel?
Check the voltage at
{C1062 = VBAT_RF ?}
& {C1000,C100 = V_BAT?}
& {C1061, C1021 = 2.85V ?}
& {C1056, C1016 = 2.65V ?}
& {C1060, C1017 = 1.8V?}
& {C1059, C1022, C1024) =
1.2V?}
Check the Voltage at
C1026 = V_BAT ?
Check component
soldering status OK at
F1000
CHECK soldered
RFS1001, C1030,L1016
Resolder or change
U1002, C1026
Resolder or change
F1000
Resolder or change
U1000
Check the freq. at
C1048 : 26MHz ?
Change or resolder
OSC1000
Check L1010,L1015
≥
-65dBm ?
Resolder or change
L1010,L1015
GSM1800 Receiver is O.K?
Resolder or change
U300
END
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check F1000 PIN 18, 19
≥
-65dBm
Resolder or change
F1000
NO
YES