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Level 3 Repair
8-46
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Check L121
≤
-65dBm ?
8-3-17. WCDMA Band8 / GSM900 RX
CONTINUOUS RX ON
RF INPUT : 9800CH
AMP : -50dBm
Check the voltage at
{C318,C319=2.2V ?}
&
{C321,C322,C324,C325,C326,C
327=1.3V ?}
resolder or change
U502
Check the freq. at :
OSC500 : 19.2MHz ?
change or resolder
OSC500
GSM900/BAND8 Receiver is O.K?
END
YES
NO
YES
NO
YES
Check
C164,L128,DPX100,L109,
L110,L129,L130,L110
≥
-65dBm ?
resolder or change
FEM100,C164,L128,DPX100,
L109,L110,L129,L130L110
NO
NO
NORMAL CONDITION
catch the channel?
Check the Voltage at
L135 = 2.6V
CHECK soldered
RFS100,L101,L121,C107,C159
resolder or change
L135, U502
NO
YES
NO
NO
YES
resolder or change
U300