Yamaha R-V702 R-V502 User Manual Page 39

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SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-E630 Flow Chart of Troubleshooting
7-17
12. GSM Receiver
U205 Pin8
>= -65dBm
Resolder CN201, R1120, C202
END
No
Yes
RX ON
RF input : center freq : 947.4 MHz
Amp : -50dBm
Check U205
pin10 = L, pin12= L
pin9=L
U205 pin5,pin6
>= -65dBm
U100 pin 6, 7, 8, 9
>= 1V
U100
pin32 >= -70dBm
pin33 >= -70dBm
Check ANT Switch
control circuit
Resoder U205
Resolder L100, L101, L102
Resolder U100
or Check pins related to U100
R116, R117, R118,
R119 >= 1V
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Check U1102
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