Samsung B2700 Service Manual page 56

Flow Chart of Troubleshooting
10-2-3. DCS1800 RX
Band : DCS
CELL POWER : -50dBm
Channel : 698Ch
NO
NORMAL CONDITION
CHECK
catch the channel?
ANT contact ?
YES
NO
F100 CHECK
F100, RFS100
pin#20 ≥ -65dBm ?
re-solder or change
YES
NO
F100 CHECK
F100
pin#5, #6 ≥ -65dBm ?
re-solder or change
YES
NO
OSC401, C111
TCXO CLOCK CHECK?
re-solder or change
26MHz @ C111
YES
NO
U100
U100 Check?
change or re-solder
YES
UCP300 CHECK!!
10-19
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