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Flow Chart of Troubleshooting
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9-36
9-17. DCS/PCS Transmitter
Resolder U101
or Check pins related to U101
MODULE1 pin10
<= 13 dBm
Resolder RFS100, C102, L100
END
Yes
No
No
Yes
U103 pin 1,2,3,4
>= 500mV
Resolder or Change U100
U100 pin 10
>= -8dBm
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
No
No
No
Check +VBAT or PAM
control signal
Resolder or Change U100
Check
VBAT
Yes
Resolder
L113,C131,C124
Check ANT Switch
control circuit
Change or Resolder
MODULE1
C107,C108 > 3 V,
TA101, F101 >
3.5V
U100 pin10
<= 13 dBm
MODULE1 pin12
<= 13 dBm
Check MODULE1
pin14 = L ,
pin13 = H(2.68V)
TX ON (5 Level)