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Flow Chart of Troubleshooting
9-18
9-2-3. DCS1800 Receiver
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continuous RX ON
RF Input : 698 CH
AMP : -50dBm
Replace PAM101
NORMAL CONDITION
Catch the channel ?
YES
NO
Check F101 #17pin
≥
-
55dBm ?
PAM100 Check
Pin #15
≥
-55dBm ?
U102 Check
Pin#15, 16,
≥
-60dBm ?
Check antenna contact
Resolder C120
PAM100 Resolder or Change
THE END
NO
NO
YES
YES
YES
Resolder
C128, C131, L109 or
Change U102
NO