Level 3 Repair
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8-46
Check C116
≤
-65dBm ?
8-3-19. GSM 850 RX/WCDMA850
GSM850
Receiver is O.K?
Resolder or change
UCP300
END
YES
NO
CONTINUOUS RX ON
RF INPUT : 4408CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
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?}
Check the Voltage at
C103 = V_BAT?
Check component
soldering status OK at
F100
CHECK soldered
CN100, C116, L108, C119
Resolder or change
U101, C103
Resolder or change
F100
Resolder or change
U104
Check the freq. at C137
: 26MHz ?
Change or resolder
OSC100
Check L103, L101,L104
≥
-65dBm ?
Resolder or change
L103, L101,L104
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check F100 PIN 16, 17
≥
-65dBm
Resolder or change
F100
NO
YES
Summary of Contents for GT-P3100
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