Pcs Transmitter - Samsung SGH-T619 Service Manual

Flow Chart of Troubleshooting

9-19. PCS Transmitter

TX ON (5Level)
Yes
F101 Pin10
>= 20dBm
No
F101 pin14
>= 18dBm
No
PAM100 pin14
>= 18dBm
No
PAM100 pin1
<= -11dBm
No
U102 pin2
<= -15dBm
No
U102 pin 6,7,8,9
>= 1V
No
Check UCP200
END
Yes
Resolder RFS100,C101,L141
Yes
Yes
Resolder C125,L110,C140
Yes
Yes
Resolder C107,L101,
Yes
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Check F101
pin15,16 = H(2.68V)
pin11,13 = L
No
Check PAM100
pin 3,4,5,6,7 OK?
No
C108,L104,C109
Check U102
pin23, 26, 31
>=2.7V
No
9-30
Yes
Change or Resolder F101
Check ANT Switch
control circuit
Yes
Resolder or Change PAM100
Check +VBAT or PAM
control signal
Yes
Resolder U102
Check & Resolder RFLO
signal, RF26MHz,
RF PSU Part