Wcdma Band8 / Gsm900 Rx - Samsung GT-P1000 Servise Manual

Level 3 Repair

8-3-16. WCDMA Band8 / GSM900 RX

NORMAL CONDITION
catch the channel?
Check C117
Check the Voltage at
C136 =VOUT_CHARGER?
PAM100 CHECK
pin5 or C142, L112
Check component soldering
status OK at PAM101, C122,
L108, L107, C121 ?
Check C116 -65dBm ?
Check component soldering
status OK at
U100, F100 ?
F100 PIN 6, 7
Check the voltage at
{R100 = VOUT_CHARGER ?}
& {C110, C343 = 2.85V ?}
& {C111,C112,C337 = 1.8V?}
& {C102,C342 = 2.85V ?}
Check the freq. at OSC100
WCDMA BAND8, GSM900 Receiver is O.K?
NO
-65dBm ?
NO
YES
-65dBm ?
YES
YES
-65dBm
YES
YES
:26MHz ?
YES
YES
END
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YES
CHECK soldered
RFS100, L105, C117, C119
NO
Resolder or change
C136, PAM100
NO
Resolder or change
PAM100, C142, L112
NO
Resolder or change
PAM101, C122, L108, L107,
C121, C116
NO
Resolder or change
U100, F100
NO
Change U302
NO
Change or resolder
OSC100
NO
Change U302
8-34
CONTINUOUS RX ON
RF INPUT : 9800CH
AMP : -50dBm