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Flow Chart of Troubleshooting
9-26
9-17. PCS Transmitter
TX ON (0Level)
Resolder U100
or check Txcpo(R112)
Check & Resolder
RF PSU part
Check U100
pin4 >= 4.0V
pin22, 28 >= 2.7V
Resolder R205
Check +VBATT
Check U200
+VBATT(pin17) OK?
Resolder or change U200
or check PAM control
signal
Resolder C219, L216, C217
Check ANT Switch
control circuit
Change
or Resolder
MODULE200
Yes
Resolder CN201, C209
END
Check U300
U100 Pin6, 7, 8, 9
>= 500mV
OSC100 pin5
>= 6Bm
U200 Pin3
>= 3dBm
U200 Pin15
>= 20dBm
MODULE200 Pin13
>= 20dBm
MODULE200 Pin8
>= 20dBm
No
Check
MODULE200
pin9=L,pin12=H
Yes
Yes
No
No
Yes
No
Yes
Yes
No
No
Yes
No
Yes
Yes
No
No