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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
3-47
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3-2-8. UMTS Transmitter
Tx ON
RF Input : 9750Ch
Cell Pwr : 24dBm
YES
Normal condition
Catch the channel
NO
NO
END
Check the UCP300
NO
Resolder or change RFSW100
FEM100
Pin#9,11 = HIGH &
Pin#10 = LOW ?
Resolder or change FEM100
Check FEM100 control path
NO
YES
NO
YES
RFSW100(RF Switch)
Pin#1, 2
≥
20dBm ?
FEM100
Pin#4
≥
20dBm ?
DUT200
Pin#3
≥
20dBm ?
PAM200
Pin#8
≥
20dBm ?
YES
F200
Pin#3
≥
-2dBm ?
U100
Pin51
≥
-2dBm ?
Check C137, C139
≥
1V ?
Check PAM200 pin#5 = HIGH ?
Resolder or change F200
NO
Resolder C202 or
change DUT200
NO
Check C203, C204
Resolder or change F200
NO
Check the path of U100
NO
Check Intenna Soldering
ANTCON100, ANTCON101
Check or resolder UCP300