Table of Contents
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Flow Chart of Troubleshooting
7-14. GSM Receiver
RX ON
RF input : 62CH
Amp : -50dBm
Yes
LMSP54HA-350 pin8
>= -65dBm
Yes
LMSP54HA-350
pin5, pin6>= -65dBm
Yes
U102
pin30 >= -70dBm
pin29 >= -70dBm
Yes
U102 pin7,8,9,10
>= 1V
Yes
C140, C141
>= 1V
Yes
Check UCP200
END
No
Resolder RFS101, C106
No
No
Resolder C117, C119, L111
No
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Check LMSP54HA-350
pin9,pin10,pin12 = L
Yes
Check U102
pin28,pin31>=2.7V
Yes
7-28
No
Check ANT Switch
control circuit
Resolder Module1
No
Check & Resolder
U102, R108 R107
RF26MHz, RF PSU Part
Resolder U102
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