Samsung B2700 Service Manual page 63

Flow Chart of Troubleshooting
10-2-8. WCDMA2100 TX
TX Power is too Low!!
TCXO CLOCK CHECK?
26MHz @ C111
YES
Check the Power @
Pin#4 of U201?
YES
Check F200 ?
YES
Check PAM200?
YES
Check L220
YES
Check DUP200?
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
U201 and C206
NO
F200
re-solder or change
NO
PAM200
re-solder or change
NO
L220
re-solder or change
NO
DUP200
re-solder or change
NO
F100
re-solder or change
NO
RFS100
change or re-solder
10-26
Band :WCDMA
CELL POWER : -50dBm
DL Channel : 10700Ch
UL Channel : 9750 Ch
Target Power : 24dBm