Gsm850/ Wcdma Band5 Rx - Samsung Galaxy Tab GT-P5100 Service Manual

Level 3 Repair

8-3-14. GSM850/ WCDMA Band5 RX

NORMAL CONDITION
catch the channel?
Check C121 ≤ -65dBm ?
Check the Voltage at
C103 =VOUT_CHARGER
Check C101
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 20, 21
≥ -65dBm
Check the voltage at
{C150 = VBAT_RF ?}
& {C149 = 2.85V ?}
& {C145 = 2.65V ?}
& {C151 = 1.8V?}
& {C152 = 1.2V?}
Check the freq. at C139
: 26MHz ?
WCDMA Band5 / GSM 850
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
L108,C121, RFS100
Resolder or change
U101, C103
Resolder or change
Check C101, C180, L101
Resolder or change
F100
Resolder or change
F100
Resolder or change
U104
Change or resolder
OSC100
Resolder or change
UCP300
8-34
CONTINUO
US RX ON
RF INPUT : 4408CH
AMP : -50dBm