Level 3 Repair
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8-52
8-3-22. GSM900/ WCDMA BAND 8 TX
CONTINUO
US RX ON
RF INPUT : 4408CH
AMP : -50dBm
PAM100 PIN 15 : About
30dBm ?
Check the Voltage at
C105 =VOUT_CHARGER ?
Check component
soldering status OK at
PAM101
CHECK soldered
L104,C108,RFS100
Resolder or change
PAM
100, C105
Resolder or change
PAM101
Check L127
≥
-
30
dBm ?
Resolder or change
Check C141
WCDMA Band5
/ GSM 850
Receiver is O.K?
Resolder or change
U401-1
END
YES
NO
NO
YES
NO
YES
NO
YES
NO
Check C174
:
Aabout 30dBm ?
Resolder or change
C139
NO
YES