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SGH-N620E Flow Chart of Troubleshooting
7-18
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13. DCS Receiver
U301 Pin8
>= -50dBm
Resolder
CN301,C306
END
No
Yes
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Check
VC1 = L,
VC2 = L
U301 pin1
>= -53dBm
F301 pin1
>= -53dBm
U302 pin 1, 2
>= 50mV
U302
pin 17, 18
>= -58dBm
Check ANT Switch
control circuit
Resoder U301
Resolder C314
Resolder
F302, C305, C307, L303
Check U302
pin 12, 13
(Freq-1000KHz)
>=-6dBm
OK?
Chekc & Resolder
I/O signal, RF13MHz,
RF_PSU Part
Resolder U302
Check
U304
pin14.16,17,
18 OK?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Resolder U205
Check U302
pin 45,23,31,32
>2.7
U304
pin 2,3,4,5
> 100mV
Check
Racio PSU
RF13MHz part
Yes
No
Check
U304
pin 7,20
OK?
Resolder
U304
Yes
Yes
No
No
No