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Level 3 Repair
8-26
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Check C117
-65dBm ?
8-3-12. GSM850 RX
NORMAL CONDITION
catch the channel?
Check the voltage at
{R100 = VOUT_CHARGER ?}
& {C110, C343 = 2.85V ?}
& {C111,C112,C337 = 1.8V?}
& {C102,C342 = 2.85V ?}
Check the Voltage at
C136 =VOUT_CHARGER
Check component
soldering status OK at
F100
CHECK soldered
RFS100, L105,C117,C119
Resolder or change
PAM100, C136
Resolder or change
F100
Change U302
Check the freq. at C128
: 26MHz ?
Change or resolder
OSC100
Check C126, L109, C125
-65dBm ?
Resolder or change
C126, L109, C125
GSM850 Receiver is O.K?
Change U302
END
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check F100 PIN 8,9
-65dBm
Resolder or change
F100
NO
YES
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