Wcdma Band8 / Gsm900 Rx Troubles - Samsung GT-I8150 Service Manual

Level 3 Repair
8-3-17. WCDMA Band8 / GSM900 RX
NORMAL CONDITION
catch the channel?
Check L121 ≤ -65dBm ?
Check the Voltage at
L135 = 2.6V
C164,L128,DPX100,L109,
L110,L129,L130,L110
≥ -65dBm ?
Check the voltage at
{C318,C319=2.2V ?}
{C321,C322,C324,C325,C326,C
327=1.3V ?}
Check the freq. at :
OSC500 : 19.2MHz ?
GSM900/BAND8 Receiver is O.K?
END
NO
YES
NO
NO
YES
Check
NO
NO
&
YES
NO
YES
NO
YES
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
CHECK soldered
RFS100,L101,L121,C107,C159
resolder or change
L135, U502
resolder or change
FEM100,C164,L128,DPX100,
L109,L110,L129,L130L110
resolder or change
U502
change or resolder
OSC500
resolder or change
U300
8-46
CONTINUOUS RX ON
RF INPUT : 9800CH
AMP : -50dBm