Samsung GT-i9000B Service Manual page 61

Level 3 Repair
8-3-16. WCDMA Band2 / GSM1900 RX
NORMAL CONDITION
catch the channel?
Check C115 ≤ -65dBm ?
Check the Voltage at
C186 = V_BAT ?
PAM101 CHECK
pin9 or C127, C143, L111 ≥
Check component soldering
status OK at PAM103, C113,
L101, C101 ?
Check C131 ≥ -65dBm ?
Check component soldering
status OK at
U100, F100 ?
F100 PIN 12, 13 ≥ -65dBm
Check the voltage at
{R100 = V_BAT ?}
& {C110, C264 = 2.85V ?}
& {C111,C112,C233 = 1.8V?}
& {C109,C263 = 2.85V ?}
& {C112 = 1.8GV ?}
Check the freq. at OSC100
WCDMA BAND2, PCS1900 Receiver is O.K?
NO
NO
YES
-65dBm ?
YES
YES
YES
YES
:26MHz ?
YES
YES
END
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YES
CHECK soldered
RFS100, L103, C115, L118
NO
resolder or change
C186, PAM101
NO
resolder or change
PAM101, C127, C143, L111
resolder or change
NO
PAM103, C113, L101, C101,
C131
NO
resolder or change
U100, F100
NO
resolder or change
UCP200
NO
change or resolder
OSC100
NO
resolder or change
UCSP200
8-34
CONTINUOUS RX ON
RF INPUT : 9800CH
AMP : -50dBm