Dcs Receiver - Samsung SGH-E740S Service Manual

9-15. DCS Receiver

RX ON
RF input : 698CH
Amp : -50dBm
Yes
MOD100 pin8
>= -65dBm
Yes
MOD100 pin3, 4
>= -65dBm
Yes
U101 pin24, 25
>= -70dBm
Yes
U101 pin1, 2, 3, 4
>= 1V
Yes
Check UCP200
END
No
Resolder CN100, C102
No
No
No
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Check MOD100
pin10, 12 = L
Yes
Resolder L107, L108, L112
Check U101 pin
5, 15, 17, 20, 31, 38
>=2.7V
Yes
9-31
Flow Chart of Troubleshooting
No
Resolder MOD100
Check ANT Switch
control circuit
No
Resolder U101
Check &Resolder
TCX100(26MHz),
RF PSU Part