![background image](http://html.mh-extra.com/html/samsung/sgh-d880/sgh-d880_service-manual_1190495058.webp)
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-24
9-13. GSM Transmitter
1)Master
END
Check UCP200
Yes
Resolder U104
Check VBAT or PAM
control signal
No
Change or Resolder F101
Yes
U104 pin 11,12,17,
32,33≥2.8V
pin10≥1.8V
F101 pin13
≥ 30dBm
Resolder RFS100,C113,L154
TX ON (5Level)
Check F101
pin12 = H (2.6V),
Pin9 = L
F101 pin10
≥ 30dBm
PAM100 pin11
≥ 30dBm
PAM100 pin7
≥ -4dBm
Check ANT Switch
control circuit
Resolder or Change L112
U104 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check PAM100
pin2,3,4,5,8 is ok?
Resolder or Change PAM100
Check U104
C126,C130,C132
And PMU Part
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No