Sharp SGH-F250 manual PCS Receiver

Flow Chart of Troubleshooting

9-14. PCS Receiver

RX ON

Cell Power : -60dBm

Yes

MODULE100 Pin13≥

-65dBm

Yes

MODULE100 5,6

≥ -68dBm

Yes

U100

pin G7 ≥ -70dBm pin F7 ≥ -70dBm

Yes

No

No

No

①

Resolder

MODULE100,C102,L102

No

Check MODULE100

pin9,pin11 = L

Yes ②

③

Resolder L101,L100,L103

Check ANT Switch

control circuit

Resolder MODULE100

④

U100 pin

No

U100 pin

No

Check & Resolder

C2,B1,B2,A1

≥ 0.2Vp_p

Yes

G4,F3,D6,C5,B3,A5, F1 29,32,33,36 ≥ 2.8V

pin C1 ≥2.9V

C115,C116,C117,C114

And PMU Part

Check UCP200

END

⑤

Yes

Resolder U100

9-26

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