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5-13 DCS Receiver
RF input : CH center freq. + 67.7 kHz
5-20
Rx On
Amp. : -50 dBm
U602
No
Pin 2
Yes
U602
Pin 16
Yes
U603
No
Pin 7
Yes
U606
Pin 2
Yes
U605
No
Pin 2, 3
Yes
U605
No
Pin 49, 50
(225 MHz)
Yes
U605
No
Pin 43, 44
(45 MHz)
Yes
U605
No
Pin 24, 25, 26, 27
Yes
Check U605
No
Yes
Resolder
U501
Check IF connector
- > resolder
Resolder &
No
U602 Pin 16
Yes
Resolder
U603
Resolder
U605, L615, L618, L619,
C639, C643, C689
Resolder
U606, L631, L632, L634
Check
C601(CH-225MHz)
C636(540MHz)
Yes
Resolder
U601, L604, C603,
C607, C609
Resolder
OneC(U501), U605
Resolder
U605 (Pin32, 33, 35)
Check
No
VC1 : L
VC2 : L
VC3 : H
No
Resolder
U612
Flow chart of trouble shooting
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