Table of Contents
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Flow Chart of Troubleshooting
7-18. PCS Receiver
RX ON
RF input : 661CH
Amp : -50dBm
Yes
LMSP54HA-350 pin8
>= -65dBm
Yes
LMSP54HA-350
pin3, pin4>= -65dBm
Yes
U102
pin32 >= -70dBm
pin33 >= -70dBm
Yes
U102 pin7,8,9,10
>= 1V
Yes
C140, C141
>= 1V
Yes
Check UCP200
END
No
Resolder RFS101, C106
No
No
No
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Check LMSP54HA-350
pin9= H
pin10, pin12 = L
Yes
Resolder C142, C143
Check U102
pin28,pin31 >=2.7V
Yes
7-32
No
Check ANT Switch
control circuit
Resolder LMSP54HA-350
No
Check & Resolder
U102, R108 R107
RF26MHz, RF PSU Part
Resolder U102
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