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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
7-41
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7-15. PCS Transmitter
U101 Pin7
< 18dBm
Resolder RFS101, C104, L123
TX ON (0Level)
Check U101
pin2, pin8 = H,
pin4 = L
U101 pin9
<20dBm
PAM101 pin18
< 20dBm
U102 pin2
< -11dBm
PAM101 pin5
< -15dBm
Change or Resolder U101
Check ANT Switch
control circuit
Resolder C139, L119, C145
Resolder R112, R114, R115, C136, L117, C151
U102 pin7, 8, 9, 10
< 1V
Yes
Check PAM101
+VBAT,
pin2,3,13,14 OK?
Resolder or Change PAM101
Check +VBAT or PAM
control signal
Check U102
pin23, 26, 31
>= 2.7V
Check & Resolder
U102, R107, R108
RF26MHz, RF PSU Part
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
END
Check U202
Resolder U102
Yes