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7-19. PCS Transmitter
TX ON (0Level)
Yes
LMSP54HA-350 Pin8
>= 20dBm
No
LMSP54HA-350 pin13
>= 18dBm
No
PAM101 pin20
>= 18dBm
No
PAM101 pin4
-11dBm
>=
No
U102 pin7,8,9,10
>= 1V
Yes
Check UCP200
END
Yes
Resolder RFS101, C106
Yes
Yes
Yes
No
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Check LMSP54HA-350
pin12 = H (2.68V),
pin9, pin10 = L
Yes
Resolder L116, C144
Yes
Check PAM101
+VBAT, pin3, pin8
OK?
No
Check U102
No
pin28,pin31
>=2.7V
OK?
Yes
7-33
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
LMSP54HA-350
Resolder or Change PAM101
Check +VBAT or PAM101
control signal
Check & Resolder
U102, R108 R107
RF26MHz, RF PSU Part
Resolder U102
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