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SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-41
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Check C115
≤
-65dBm ?
8-3-14. GSM850 RX
NORMAL CONDITION
catch the channel?
Check the voltage at
{C324,L300,L301 = V_BAT?}
& {L103,C317,C318,C319= 1.
8V?}
Check the Voltage at
C130 =V_BAT
Check the voltage at
{R106 = VBAT ?}
& {C158, C160 = 1.8V ?}
& {C161,151,C152,C153,
C154,C155,C157=2.85?}
CHECK soldered
RFS100, L102,C115,C104
resolder or change
U102,C129,C130,C131,C134
resolder or change
U105
resolder or change
UCP300
Check the freq. at C185
: 26MHz ?
change or resolder
OSC100
Check C111, C103, C107,
L100
≥
-65dBm ?
resolder or change
C111, C103, C107, L100
GSM850 Receiver is O.K?
resolder or change
UCP300
END
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check the voltage at
{C188 = RF_VDD_MAIN?}
resolder or change
U108,U101,
C186,C188,C125,C124,R103,L106
NO
YES