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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-21
9-13. GSM850 Transmitter
RFS102 pin
16,17,29
32,36 ≥2.8V
No
Resolder RFS102
Check UCP201
END
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
Check FS102
C117,C126,L123
Check VBAT or PAM
control signal
Resolder or Change PAM100
Check PAM100 pin
2,3,5,6,8, Vbatt
pin4, OK?
Yes
RFS102 pin 4,5,6,7
≥ 0.2Vp_p
Resolder or Change L117,C121
Check ANT Switch
control circuit
Change or Resolder F100
RFS102 pin15
≥ -4dBm
PAM100 pin12
≥ 30dBm
F100 pin15
≥ 30dBm
Check F100
pin10 = H (2.6V),
Pin11 = L
TX ON (5Level)
Resolder RFS100,RFS101, R100,
L101,L100,C101
F100 Pin19
≥ 30dBm