Dcs Receiver - Samsung SGH-E700 Service Manual

SGH-E700 Flow Chart of Troubleshooting

14. DCS Receiver

RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
F101 Pin8
>= -65dBm
F101 pin1
>= -65dBm
F102 pin1
>= -70dBm
U100
pin35 >= -70dBm
pin36 >= -70dBm
U100 pin5, 6, 7, 8
>= 1V
R101, R102, R105,
R106 >= 1V
Check UCP200
END
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
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Resolder RFS100, C100
Check F101
pin11 = L, pin2 = L
Yes
Resolder F102, C112, L104
Resolder L103, C110, C113
Check U100 pin26
(RF freq.*2)+100kHz
>=-30dBm
Yes
19
7-
No
Check ANT Switch
control circuit
Resoder F101
No
Check & Resolder
U100, C121, R110
RF13MHz, RF PSU Part
Resolder U100