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Flow Chart of Troubleshooting
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9-33
9-14. GSM900 Transmitter
No
Yes
Yes
No
Check pam100 pin
1,2,3,17,18,20 OK?
Yes
Resolder or Change PAM100
Check VBAT or PAM control signal
Check control circuit and
Resolder F100
PAM100 pin12
≥
30dBm
Check F100
pin14=H, pin10=L
TX ON (5Level)
Resolder RFS100,C106,L101
F100 Pin11
≥
30dBm
No
Yes
Yes
Check UCP200
END
No
Resolder C145,C103
U100 pin 26,27,28,29
≥
0.2Vp_p
U100
pin5,10,11,25,32,34,
36
≥
2.8V
pin4
≥
1.8V
Check & Resolder
C132,C123,C122
and PMU Part
Resolder U100
No
No
Yes
Yes
Summary of Contents for GT-S5200
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