Dcs Rx - Samsung SGH-S720i Service Manual

3-2-2. DCS Rx

Continuous RX ON
Normal Condition Catch the
Check pin #12 of
PAM100 ≥ -65dBm
Check pin #19 of
PAM100 ≥ -65dBm
Check pin #22,23 of
RFT100 ≥ -65dBm
Check pin #16,17,33 of
RFT100 ≥ 2.9V
Check the pin #34,35 of RFT100
Check the pin #4,5,6,7 of
RFT100 Vp-p=100mV
GSM Receiver is O.K?
SAMSUNG Proprietary-Contents may change without notice
YES
channel
YES
YES
YES
YES
YES
=26Mhz
YES
YES
YES
END
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Flow Chart of Troubleshooting and Circuit Diagrams
Check soldered status of
NO
C101,L103,L100,L101,C110
Resolder or Change
NO
RFS100,L100,L101,C110
NO
Resolder or Change PAM100
NO Check soldered status of
C120,C125,L107
NO
Check or Resolder BTC601,C604
NO
Resolder or Change OSC100
NO
Resolder or Change RFT100
NO
GSM RX path component
resolder or change
3-25