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