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17. PCS Transmitter
TX ON (5Level)
MODULE1 pin13
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Yes
MODULE1 Pin8
>= 20dBm
Yes
>= 18dBm
Yes
U101 pin9
>= 18dBm
Yes
U101 pin1
<= -11dBm
Yes
U101 pin1
<= -15dBm
Yes
U100 pin
H8,J8,H7,J7
>= 1V
Yes
Check U200
END
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No
Resolder CN100, C102
Check MODULE1
No
pin12 = H (2.68V),
pin9,10 = L
Yes
No
Resolder L109, R100, C121
No
Check U101
pin 5, OK?
Yes
No
Resolder R103, R104, R105
No
R110, C126, C129
>=2.7V
OK?
Yes
7-29
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
MODULE1
No
Resolder or Change U101
Check +VBAT or PAM
control signal
Check & Resolder RFLO
No
signal, RF13MHz,
RF PSU Part
Resolder U100
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