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8-3-4. GSM900 RX
Phone can't catch GSM900 network
NORMAL CONDITION
@CN100
Check the connection
PAM100 @C103 3.0V ?
SAMSUNG Proprietary-Contents may change without notice
catch the channel?
YES
PAM100 CHECK
-65dBm ?
YES
C160, C163, L117
YES
Check the voltage
YES
Replace Board(PBA)
previous step
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NO
Put more lead solder
@C104,L105,C170,L120,L101
L102, R100,R101,R102,R103
NO
Put more lead solder@CN100,
L120,L101,L102,L131
NO
Put more lead solder
each terminal
NO
Put more lead solder
each terminal
NO
Back to
8-11
Level 3 Repair
CONTINUOUS RX ON
RF INPUT : 62CH
Amplitude : -50dBm
Does Phone catch
the GSM900 network?
YES
END
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