Wcdma Band2 / Gsm1900 Rx - Samsung GT-N8000 Servise Manual

Level 3 Repair

8-3-17. WCDMA Band2 / GSM1900 RX

NORMAL CONDITION
catch the channel?
Check C139 ≤ -65dBm ?
Check the Voltage at
C142 =VOUT_CHARGER
Check C133, L113
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 16, 17
≥ -65dBm
Check the voltage at
{C169 = VBAT_RF ?}
& {C168 = 2.85V ?}
& {C164 = 2.65V ?}
& {C170 = 1.8V?}
& {C171 = 1.2V?}
Check the freq. at C158
: 26MHz ?
WCDMA Band2 / GSM1900
Receiver is O.K?
END
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NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
CHECK soldered
RFS100,L101,C139
Resolder or change
U106, C142
Resolder or change
Check C133, L113
Resolder or change
F100
Resolder or change
F100
Resolder or change
U101,C164,C168,C169,C170,C171
Change or resolder
OSC100
Resolder or change
UCP300
8-40
CONTINUOUS RX ON
RF INPUT : 9880CH
AMP : -50dBm