Dcs Receiver - Samsung SGH-D880 Service Manual

Flow Chart of Troubleshooting

9-14. DCS Receiver

1)Master
RX ON
RF input : CH center freq : +67.7kHz
Cell Power : -60dBm
Yes
F101 pin13
≥ -65dBm
Yes
F101 pin3,4
≥ -68dBm
Yes
U104
pin22,23 ≥ -70dBm
Yes
U104 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check UCP200
END
No
Resolder RFS100,C113,C154
No
No
Resolder C110, C114, L108
No
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Check F101 pin9,12
= L
Yes
U104
pin11,12,17,32,33
≥2.8V
pin 10≥1.8V
Yes
9-26
No
Check ANT Switch
control circuit
Resolder F101
No
Check & Resolder
C126,C130,C132
And PMU Part
Resolder U104