Samsung B2700 Service Manual page 62

10-2-7. DCS1800/PCS1900 TX
TX Power is too Low!!
TCXO CLOCK CHECK?
26MHz @ C111
YES
Check the Power @
Pin#17 of U100?
YES
Check the Matching
Circuit ?
YES
Check the Power
@Pin#20 of F100?
YES
Check RFS100?
YES
Antenna
re-solder or change
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NO
OSC401, C111
re-solder or change
NO
CHECK
U100 and C106
NO
CHECK C131, L107,
C128
NO
F100
re-solder or change
NO
RFS100
change or re-solder
10-25
Flow Chart of Troubleshooting
Band :DCS/PCS
CELL POWER : -50dBm
Tx Power : 0Level
Channel : 660ch