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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-23
9-12. GSM Receiver
1)Master
Check ANT Switch
control circuit
Resolder F101
Check & Resolder
C128,C126,C125,C129
And PMU Part
Resolder U100
RX ON
RF input : CH center freq : +67.7kHz
Cell Power : -60dBm
Yes
F101 pin13
≥ -65dBm
No
Resolder RFS100,C107,R101,R100
Yes
F101 pin1,2
≥ -68dBm
Check F101 pin9,12
= L
No
No
Yes
Yes
No
Resolder C113, C121 L106
U100
pin24,25 ≥ -70dBm
Yes
No
U100 pin11,12,16,
32,33≥2.8V
pin10≥1.8V
U100 pin 4,5,6,7
≥ 0.2Vp_p
No
Yes
Yes
Check UCP200
END