Samsung SGH-B100 Service Manual page 47

Flow Chart of Troubleshooting
10-2.RF
10-2-1. EGSM Rx
Continuous RX ON
Normal Condition Catch the
Check pin #11 of
PAM100 ≥ -65dBm
PAM100 ≥ -65dBm
Check pin #29,30 of
Check pin #17 of
Check the pin #19,20 of
Check the pin #2,3,22,23 of
U103 Vp-p=120mV
GSM Receiver is O.K?
This Document can not be used without Samsung's authorization
RF Input : 62CH
AMP : -50dBm
YES
channel
YES
YES
Check pin #7 of
YES
U103 ≥ -65dBm
YES
U103 ≥ 2.8V
YES
U103=26Mhz
YES
YES
YES
END
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Check soldered status of
NO
TP101, R100, R102, C100, L100
NO
RFS100,C103,C105,L101, L 107,L108
NO
Resolder or Change PAM100
NO Check soldered status of
NO
Resolder or change UCP300
NO
Resolder or Change OSC100
NO
Resolder or Change U103
NO
GSM RX path component
10-16
Resolder or Change
C117, C124, L103
pinA13 C315
resolder or change