Samsung SGH-M310 Service Manual page 52

10-2-2. DCS RX
NORMAL CONDITION
catch the channel?
PAM100
pin13 ≥ -65dBm ?
PAM100 CHECK
pin17 ≥ -65dBm ?
F100 CHECK
pin3 ≥ -65dBm ?
RFT100
pin27,28 ≥ -65dBm ?
RFT100
pin 17 : 2.8V ?
RFT100 CHECK
pin 19,20 :
26MHz ?
Vp-p : 380mV?
RFT100 pin
2,3,22,23 Vp-p
: 120mV ?
DCS Receiver is O.K?
SAMSUNG Proprietary-Contents may change without notice
NO
YES
NO
CHECK
YES
NO
YES
NO
YES
NO
CHECK
YES
NO
YES
NO
change or resolder
YES
NO
YES
NO
YES
END
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CHECK soldered
ANT contact,C130,L101,C100,R100
PAM100,RFS100
resolder or change
PAM100
resolder or change
F100
resolder or change
RFT100
resolder or change
UCD300 pinF3, C311,C312
change or resolder
OSC100
RFT100
resolder or change
GSM RX path component
resolder or change
10-14
Flow Chart of Troubleshooting
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm