Samsung GT-S5750E Service Manual page 68

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8-4-6. WCDMA Band 1 RX
Phone can't catch WCDMA2100 network
NORMAL CONDITION
catch the channel?
PAM100 CHECK
@RFS100
Check the connection
Check the voltage
PAM100 @C107 3.0V ?
Replace Board(PBA)
SAMSUNG Proprietary-Contents may change without notice
YES
-65dBm ?
YES
C140,C144,L113
YES
YES
Back to
previous step
This Document can not be used without Samsung's authorization
NO
Put more lead solder
@RFS100,L126,C106,L102
C108
NO
Put more lead
@RFS100,L126,L102,C108
NO
Put more lead solder
each terminal
NO
Put more lead solder
each terminal
NO
WCDMA2100 network?
8-41
Level 3 Repair
CONTINUOUS RX ON
RF INPUT : 3013CH
Amplitude : -50dBm
Does Phone catch
YES
END

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