14. gsm receiver – Sharp SGH-J200 User Manual

Page 56

background image

SAMSUNG Proprietary-Contents may change without notice

Flow Chart of Troubleshooting

This Document can not be used without Samsung's authorization

9-25

9-14. GSM Receiver

Yes

C105

>= -65dBm

No

Resolder RFS100,C105,L103

Yes

L117

>= -68dBm

No

No

Resolder U100

or

Check pins related to U100

U100 pin

10, 11, 12, 13

>= 500mV

Yes

Check U100

END

Yes

RX ON

RF input : CH center freq : +67.7kHz

Amp : -50dBm

Resolder F100