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Flow Chart of Troubleshooting
7-34
7-17. DCS Transmitter
LMSP54HA-350
pin8
>= 20dBm
Resolder RFS101, C106
TX ON (0Level)
Check Module1
pin12 = H (2.68V),
pin9, pin10 = L
LMSP54HA-350
pin13
>= 18dBm
PAM101 pin20
>= 18dBm
PAM101 pin4
>=
-11dBm
Change or Resolder
Module1
Check ANT Switch
control circuit
Resolder L110, C117, L112, C139
Yes
Check PAM101
+VBAT, pin3, pin8
OK?
Resolder or Change PAM101
Check +VBAT or PAM101
control signal
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
U102 pin7,8,9,10
>= 1V
Check & Resolder
U102, R108 R107
RF26MHz, RF PSU Part
Yes
No
No
END
Check UCP200
Resolder U102
Yes
Check U102
pin28,pin31
>=2.7V
OK?