Level 3 Repair
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8-54
Check C112
≤
-65dBm ?
8-3-16. WCDMA Band8 / GSM900 RX
NORMAL CONDITION
catch the channel?
Check the voltage at
{C147 = VOUT_CHARGER ?}
& {C157, C159
= VOUT_CHARGER?}
& {C146 = 2.85V ?}
& {C141= 2.65V ?}
& {C168 = 1.8V?}
& {C144= 1.2V?}
Check the Voltage at
C102 = 2.85V?
Check component
soldering status OK at
F101
CHECK soldered
RFS101, L107,C112
Resolder or change
F100, C102
Resolder or change
F101
Resolder or change
U104
Check the freq. at
OSC100 pin3: 26MHz ?
Change or resolder
OSC100
Check L116, C126
≥
-65dBm ?
Resolder or change
L116, C126
WCDMA band8/GSM900
Receiver is O.K?
Resolder or change
UCP300
END
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check F101PIN 22, 23
≥
-65dBm
Resolder or change
F101
NO
YES
CONTINUOUS RX ON
RF INPUT : 3013CH
AMP : -50dBm