Samsung SGH-E360 - GSM Transmitter Troubleshooting

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Flow Chart of Troubleshooting
7-32
7-15. GSM Transmitter
LMSP54HA-350 Pin8
>= 20dBm
Resolder RFS101, C106
TX ON (5Level)
Check LMSP54HA-350
pin10 = H (2.68V),
pin9, pin12 = L
LMSP54HA-350 pin11
>= 18dBm
PAM101 18pin
>= 18dBm
PAM101 14pin
>= -11dBm
Change or Resolder
LMSP54HA-350
Check ANT Switch
control circuit
Resolder R122
Yes
Check PAM101
+VBAT, pin15,
pin8 OK?
Resolder or Change PAM101
Check +VBAT or PAM101
control signal
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
Check & Resolder
U102, R108 R107
RF26MHz, RF PSU Part
Check U102
pin28,pin31 >=2.7V
OK?
U102 pin7,8,9,10
>= 1V
Yes
Yes
Resolder U102
Check UCP200
END