Samsung SGH-E340 - PCS Transmitter

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Flow Chart of Troubleshooting
7-26
7-17. PCS Transmitter
MODULE1 Pin8
>= 20dBm
Resolder CN101, C101
TX ON (5Level)
Check MODULE1
pin12 = H (2.68V),
pin9,10 = L
MODULE1 pin13
>= 18dBm
U702 pin9
>= 18dBm
U702 pin1
<= -15dBm
U702 pin1
<= -11dBm
Change or Resolder
MODULE1
Check ANT Switch
control circuit
Resolder L118, R144, C154
Resolder R106, R107, R108
U100 pin
H8,J8,H7,J7
>= 1V
Yes
Check U702
pin 5, OK?
Resolder or Change U702
Check +VBAT or PAM
control signal
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
END
Check U200
Resolder U100
Yes
R135, C157, C123
>=2.7V
OK?