Flow Chart of Troubleshooting
9-12. GSM Receiver
RX ON
Cell Power :
Yes
MODULE100 Pin13≥
Yes
MODULE100 1,2
≥
Yes
U100
pin C7 ≥
Yes
U100 pin
C2,B1,B2,A1
≥ 0.2Vp_p
Yes
No
No
No
No
①
Resolder
MODULE100,C102,L102
No
Check MODULE100
pin9,pin11 = L
Yes ②
③
Resolder L110, L111, L112
U100 pin | No | |
G4,F3,D6,C5,B3,A5, |
|
|
F1 29,32,33,36 ≥ |
|
|
|
| |
2.8V |
|
|
pin C1 ≥2.9V |
|
|
Check ANT Switch
control circuit
Resolder MODULE100
④
Check & Resolder
C115,C116,C117,C114
And PMU Part
Check UCP200
END
⑤
Yes
Resolder U100
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