Samsung GT-S5200 - Network and Call Issues; Audio and Microphone Problems

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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
≥
30
dBm
Check F100
pin14=H, pin10=L
TX ON
(5
Level)
Resolder RFS100,C10
6,
L10
1
F100 Pin11
≥
30
dBm
No
Yes
Yes
Check UCP200
END
No
Resolder C1
45,C103
U100 pin
26,27,28,29
≥
0.2
Vp_p
U100
pin5,10,11,25,32,34,
36
≥
2.8V
pin4
≥
1.8V
Check
&
Resolder
C1
32,
C1
23,
C1
22
and PMU Part
Resolder
U100
No
No
Yes
Yes