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Flow Chart of Troubleshooting
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7-33
7-18. PCS Transmitter
Module1 Pin8
>= 20dBm
Resolder CN100, C103
TX ON (0Level)
Check Module1
pin12 = H (2.68V),
pin9, pin10 = L
Module1 pin13
>= 18dBm
U101 pin9
>= 18dBm
U101 pin1
>=
-11dBm
Change or Resolder
Module1
Check ANT Switch
control circuit
Resolder L102, L108, C113
Yes
Check U101
+VBAT, pin4, pin6
OK?
Resolder or Change U101
Check +VBAT or U101
control signal
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
U100 H7,H8,J7,J8
>= 1V
Check & Resolder
U100, C147, R117
RF26MHz, RF PSU Part
Yes
No
No
END
Check U200
Resolder U100
Yes
Check U100
J2,A6,B6,A9,E9
>=2.7V
OK?
