Samsung SGH-B100 Service Manual page 48

10-2-2. DCS Rx
Continuous RX ON
RF Input : 660CH
AMP : -50dBm
Normal Condition Catch the
Check pin #11 of
PAM100 ≥ -65dBm
Check pin #6 of
PAM100 ≥ -65dBm
Check pin #27,28 of
U103 ≥ -65dBm
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?
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
YES
channel
YES
YES
YES
YES
U103 ≥ 2.8V
YES
U103=26Mhz
YES
YES
YES
END
Check soldered status of
NO
TP101, R100, R102, C100, L100
NO
RFS100, L 107,L108,C103,C105,L101
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
10-17
Flow Chart of Troubleshooting
Resolder or Change
C108, C110, L102
pinA13 C315
resolder or change