Wcdma Band5 / Gsm 850 Rx - Samsung GT-N8000 Servise Manual

Level 3 Repair

8-3-18. WCDMA Band5 / GSM 850 RX

NORMAL CONDITION
catch the channel?
Check C139 ≤ -65dBm ?
Check the Voltage at
C142 =VOUT_CHARGER
Check L114, L116, L117
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 20, 21
≥ -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 Band5 / GSM 850
Receiver is O.K?
END
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NO
YES
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NO
YES
NO
YES
NO
YES
NO
YES
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YES
NO
YES
NO
CHECK soldered
RFS100,L101,C139
Resolder or change
U106, C142
Resolder or change
Check L114, L116, L117
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
8-42
CONTINUOUS RX ON
RF INPUT : 4408CH
AMP : -50dBm