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Flow Chart of Troubleshooting
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9-21
9-11. GSM Receiver
Check ANT Switch
control circuit
Resolder F100
Check & Resolder
C116,C119,C122
and PMU Part
Resolder U101
RX ON
RF input : CH center freq : +67.7kHz
Cell Power : -60dBm
Yes
F100 Pin13
≥ -65dBm
No
Resolder RFS100,C101,L100
Yes
F100 1,2
≥ -68dBm
Check F100
pin9,pin12 = L
No
No
Yes
Yes
No
Resolder C112, C115, L107
U100
pin 24 ≥ -70dBm
pin 25 ≥ -70dBm
Yes
No
U100pin11,12 16,17,
29,32,33,36 ≥2.8V
pin10≥1.8V
U100 pin 4,5,6,7
≥ 0.2Vp_p
No
Yes
Yes
Check UCP200
END
Содержание SGH-L310
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